Department of Energy · declassified
Operation Castle and Castle Bravo Declassified Documents
165 declassified records on Operation Castle and Castle Bravo, dated 1952 to 1989, released by the U.S. Department of Energy. Each one opens with its archive description, the text of the document and a link to the original scan.
- Feb 28, 1956Operation Castle - Project 2.5B, Fallout Studies (Deleted)Report · 134p
- May 18, 1981Castle-Bravo Air Concentration and Deposition Patterns from a 3-D Particle-in-Cell Code (Draft)Report · 32p
- Sep 30, 1956United States Atomic Energy Commission Quarterly Progress Report to the Joint Committee on Atomic Energy, July - September 1956, Part VII, Biology and Medicine (Partial)Report · 5p
- Mar 1, 1954Note by the Secretary, Subject: Reactivation of the Medical Survey Team for the Marshallese Exposed to Fallout from the " Bravo " Test on March 1, 1954 (Castle Operation, Bravo Event)Report · 8p
- Mar 29, 1954Operation Castle, Operation Order Task Group 7.4, Number 4-54, 29 March 1954Report · 59p
- Dec 31, 1989Analysis of Radiation Exposure for Additional Naval Personnel at Operation Castle -- Supplemental ReportReport · 125p
- Mar 4, 1954TWX to Bugher, Et Al, Subject: Evacuation of Natives from Rongelap Completed (Bravo Event, Castle Operation)Correspondence · 1p
- Nov 1, 1954Operation Castle - Addendum Report 4.1A: Medical Examination of the Rongelap People 6 Months After Exposure to Fallout Radiation During Operation CastleAppendix · 4p
- Jan 7, 1955Letter to Commander, Task Group 7.1, Subject: Monthly Radiological Survey of Bikini Atoll (Castle Operation)Correspondence · 2p
- May 4, 1961Memo to Seaborg, Et Al, Subject: Summary and Report Entitled " Medical Survey of Rongelap People Five and Six Years After Exposure to Fallout " (Castle Operation, Bravo Event)Correspondence · 1p
- Nov 10, 1954Fallout ComparisonsReport
- May 17, 1955World-Wide Fallout from Operation Castle (Deleted)Report · 223p
- Feb 28, 1956Report to the Scientific Director, Operation Castle, Project 2.6B, Radiochemical Analysis of FalloutCorrespondence
- Apr 30, 1955Operation Castle: Medical Examination of Rongelap People Six Months After Exposure to Fallout Addendum Report 4.1AReport · 36p
- Dec 31, 1958Atomic Industrial Progress and Second World Conference July - December 1958 (Partial Document, PP 194-198, DBM Summary, Hardtack I and II Summaries; Marshallese re-Examined 4 Years After Bravo)Report · 6p
- Mar 31, 1959Samples to Be Collected at Rongelap Atoll for Radiation Monitoring February - March 1959Report · 3p
- Dec 16, 1964Estimate of the Radiation Dose to Thyroids of the Rongelap Children Following the Bravo Event, Castle OperationReport · 4p
- May 31, 1965Gamma Dose Rates at Rongelap Atoll, 1954-1963Report · 21p
- May 31, 1965Gamma Dose Rates at Rongelap Atoll 1954-1963 (Bravo Event, Castle Operation Fallout on Rongelap Time Study)Report · 20p
- Dec 31, 1953Joint Task Force Seven, Task Group 7.3 - History of Operation Castle - Volumes I and II, Installments 1, 2, 3 and 4 (1953 - 1954)Report
- Apr 7, 1954Operation Castle, Operation Order Task Group 7.4, Number 5-54, 7 April 1954Report
- Apr 19, 1954Operation Castle, Operation Order Task Group 7.4, Number 7-54, 19 April 1954Report
- Apr 27, 1954Operation Castle, a Very Preliminary Report on the Results of the () Event (Partial) (Deleted)Report
- Dec 31, 1954Aircraft Decontamination (Castle Operation)Report
- Dec 31, 1954Pathological Findings on Late () (Japanese Fisherman) (Bravo Event) (Castle Operation)Report
- Dec 31, 1954Castle Local Fall - Out ForecastingReport
- Dec 31, 1954Operation Castle, Pacific Proving Ground, Spring of 1954 (Deleted)Report
- Dec 31, 1954Fundamental Considerations in Determining Significant Levels of Radioactive Contamination of Food and WaterReport
- Jul 13, 1954Conference on Long Term Surveys and Studies of Marshall Islands, U S Atomic Energy Commission Division of Biology and MedicineReport
- Jun 30, 1954Report of the Commander Task Group 7.1 (Castle Operation) (Partial) (Deleted)Report
- May 15, 1954Joint Task Force Seven Commander Task Group 7.3, History of Operation Castle Installment Number 4 (Final Installment) RCS-JTF Seven H-1 Period 8 April Through 15 May 1954Report
- May 19, 1954Commander Task Group 7.2 Joint Task Force Seven Final Report Operation CastleReport
- Nov 1, 1954Site Fred - Building Numbers & Occupancy (Fred Islands - Site Information) (Revised November 1, 1954)Report
- Oct 31, 1954Study of Response of Human Beings Accidentally Exposed to Significant Fallout Radiation (Castle Operation)Report
- Oct 31, 1954Study of Response of Human Beings Accidentally Exposed to Significant Fallout Radiation (Operation Castle - Final Report Project 4.1, March - May 1954)Report
- Jan 21, 1955Radioactive Debris from Operation Castle: Worldwide FalloutReport
- Mar 31, 1955Operation Castle, Project 3.3, Blast Effects on Tree Stand (Report to the Test Director)Report
- Jan 13, 1956Four-Pi Gamma Ionization Chamber Decay Measurements of Fallout Samples from Operation CastleReport
- Feb 1, 1980Operation Castle Report of Commander, Task Group 7.1 Pacific Proving Grounds March - May 1954 (Extracted Version) (Deleted)Report
- Feb 1, 1980Operation Castle - Project 4.1, Addendum Exposure of Marshall Islanders and American Military Personnel to Fallout (Deleted)Report
- Apr 1, 1981Operation Castle Radiological SafetyReport
- Nov 1, 1981Operation Castle Report of the Manager Santa Fe Operations - Pacific Proving Ground Spring of 1954 (Extracted Version)Report
- Nov 1, 1981Operation Castle Operation Plan No. 3-53 March - May 1954 (Extracted Version)Report
- Apr 24, 1986Analysis of Radiation Exposure Service Personnel on Rongerik Atoll Operation Castle, Shot BravoReport
- UndatedClimatology of the Eniwetok - Bikini Area for the Months of January, February, March and April (Encl; Castle Predictions)Report
- Mar 13, 1953Memo to J-3, TG7.1, JTF7, Subject: Radiation Levels, Enewetak Atoll (Encl; Procedure for Decontamination of Ursul) (Castle Operation)Correspondence
- May 28, 1953Atomic Energy Commission - Military Liaison Committee Minutes of Eight-First ConferenceMeeting minutes
- Apr 20, 1954TWX to Uwfja Chairman AEC Wash DC, Subject: Utirik Natives Moved to Ebeye by Adm Clark, Skin Lesions Continue to Desquamate (Lists Other Medical Info on Islanders) (Operation Castle)Correspondence
- Dec 31, 1954Radiological Survey Plan for the Northern Marshall IslandsPlan
- Mar 3, 1954Memo to Chairman AEC, Subject: H Plus 48 Hour Advisory: Surface Rad Readings at Rongelap Weather Detachment Aerial Survey of Utirik EvacuationCorrespondence
- Mar 19, 1954TWX to Bradbury, Et Al, Subject: 24 Rongelap Natives Epilating (Bravo Event, Castle Operation)Correspondence
- Mar 29, 1954List of Various TWX'S to AEC, Et Al, Subject: Survey of Weather Conditions for Detonation (Romeo), Monitoring of Utirik Natives, and (TWX'S 2-1 Thru 2-17, 03/24-03/29/54)Summary
- May 7, 1954Operation Order, CJTF Seven No. 2-54 (Interim Phase Operation Order) (Between Castle Operation and Redwing Operation) (Route Slip Attached)Unknown
- Nov 27, 1956Biology and Medicine (PP. 50-56) 1249TH AEC Meeting, 11/27/56Meeting minutes
- May 4, 1961Memo to Chairman Seaborg, Et Al, Subject: Summary and Report Entitles " Medical Survey of Rongelap People Five and Six Years After Exposure to Fallout " (Castle Operation, Bravo) (No Enclosure)Correspondence
- Jul 12, 1965Memo to Seaborg, Et Al, Subject: Thyroid Disease in Rongelap Islanders (Castle Operation, Bravo Event, Medical Surveillance)Correspondence
- Jun 22, 1965Memo to Seaborg, Et Al, Subject: Summary of 1965 Survey of the Rongelap People by DR Robert Conard, Brookhaven National Laboratory (Companion Document Is 408276) (Castle Operation, Bravo Event)Correspondence
- Dec 31, 1978Operations Plan Mission FY 1978 No. 4 BNL Medical Survey - Majuro, Ebeye, Rongelap, Utirik, and Enewetak LLL Resuspension Experiment, Garden Project - Bikini and EnewetakPlan
- UndatedFinal Report of Accumulated Radiation Exposures for Operation Castle, Task Group 7.5Report
- UndatedOperation Castle - Project 9.1, Cloud PhotographyReport
- Jun 25, 1952716TH AEC Meeting - Selection of a Site for Operation CastleMeeting minutes
- May 26, 1952Letter to a C Graves, Subject: Reference to LTR re Operation CastleCorrespondence
- Aug 13, 1953Letter to R Chesney, Subject: Operation Castle (No Attachments)Correspondence
- Aug 14, 1953TWX, Subject: Exchange Security Lights Purchased for Assembly Area at Elmer with Those Installed Around Administration Compound to Decrease Glare Effect in Barracks AreaCorrespondence
- Aug 17, 1953Letter to Distribution, Subject: General Concept of Operation Castle (Revision #1) (Castle Operation) (Deleted) (Partial) (J-19161)Correspondence
- Dec 3, 195387TH AEC-MLC Meeting - 12-3-53 - Observers at CastleMeeting minutes
- Dec 8, 1953Commander Task Group 7.1, Joint Task Force Seven Operation Plan No. 1-53, Operation Castle (Deleted)Miscellaneous
- Dec 16, 1953Memo to R B Snapp, Subject: Information Plan for Operation Castle (No Attachments)Correspondence
- Feb 4, 1953Tentative Experimental Outline - Operation Castle (Deleted)Outline
- Feb 9, 1953TWX, Subject: Relocation for Building Four Zero Six But Desires Classification Yard Fence and Stabilization of Yard Be Processed at Jobsite as a New Engineering Change Order Subject to ApprovalCorrespondence
- Feb 20, 1953Letter to K E Fields, Subject: Question of Advisability of Substituting an Air Drop for a Surface Event in Operation Castle (Deleted)Correspondence
- Feb 25, 1953Memo to C L Tyler, Subject: Advisability of Substituting an Air Drop for a Surface Drop -- Operation CastleCorrespondence
- Jan 5, 1953Memo to Director of Military Applications, AEC, Subject: Danger Area for Operation CastleCorrespondence
- Jan 15, 1953Letter to a B Walk, Subject: Reply to LTR of December 19, 1952, Regarding Exposures for Operation CastleCorrespondence
- Jul 27, 1953Memo to J C Bugher, Subject: Radiological Safety Regulations, Operation CastleCorrespondence
- Mar 6, 1953Memo to J D Servis, Subject: Health Hazards of Operation CastleCorrespondence
- May 29, 1953TWX to Chief, AFSWP, Et Al, Subject: Following Schedule Now Under Consideration (Deleted)Correspondence
- Apr 1, 1954Refusal to Permit American Review and Participation in Clinical Studies (Draft)Draft; report
- Apr 2, 1954Memo to Tompkins, Subject: Our Telecon 31 March 1954 (Aircraft Delayed Due to Possible Contamination)Correspondence
- Apr 5, 1954Operations Order Task Group 7.4 No. 4-54, Change Nos. 1 + 2 - Operation CastleUnknown
- Apr 12, 1954Memo for Record, Subject: Operation Castle, Shot Bravo with AttachmentsCorrespondence
- Apr 14, 1954Project Hardy (the Return of the Native) (Bravo Event, Castle Operation)Book
- Apr 19, 1954Memorandum for Record, Subject: Additional Ground and Air Radsafe Survey Data During Period Bravo to Bravo Plus 5 DaysCorrespondence
- Apr 19, 1954Memorandum for Record, Subject: Additional Ground and Air Radsafe Survey Data During Period Bravo to Bravo Plus 5 DaysCorrespondence
- Apr 23, 1954Memo to DR Walter Claus, Subject: Fallout Data (Castle Operation)Correspondence
- Apr 26, 1954Meteorlogical Data - Union Event, Castle Operation (Measurements Taken by USS Curtiss)Data
- Apr 27, 1954TWX, Subject: Surveys Indicates No Report No Significant Fallout on Any Locality of the Northern Marshalls or Interference with Air or Surface RoutesCorrespondence
- Apr 27, 1954TWX to AEC, Et Al, Subject: Aerial Surveys Indicate No Significant Fallout on Any Locality of Northern Marshalls or Intereference with Air or Surface Routes (Union Event, Castle Operation) (DeleteDiary
- Aug 17, 1954Incoming Telegram to Secretary of State, Subject: Difference of Opinion Between JSC and Official Atomic Energy Utilization Preparation Investigation Committe re Policital SecurityCorrespondence
- Dec 31, 1954Memo to Morton, Et Al, Subject: Refusal to Permit American Review and Participation in Clinical StudiesCorrespondence
- Dec 31, 1954TWX, Subject: Sill Blocks and Molds on Easy Roger Easy Four Zero Nine One Scheduled to Arrive Travis Two Six FebCorrespondence
- Dec 31, 1954TWX to Clarkson and Graves, Subject: More Tugs to Collect Water Samples from Operation CastleCorrespondence
- Dec 31, 1954Fallout Data (Castle Operation)Data
- Feb 10, 1954Memo to Commander Task Group 7.3, Subject: History of Operation Castle, Installment Number 2, Period Ending 24 January 1954 (Attached: Transmittal to Commander JTF7)Correspondence
- Feb 24, 1954TWX, Subject: Correct Schedule for Sill Blocks and Molds on Easy Roger Easy Four Zero Nine One Is Two Seven RPT Two Seven Feb 24, 1954Correspondence
- Feb 28, 1954Meteorological Data - Bravo Event (Measurements Taken by USS Bairoko)Data
- Feb 28, 1954Hodographs for Operation Castle - Event 1 - Bravo (Bravo Event)Data
- Feb 28, 1954Five Graphs Pertaining to Operation Castle - Event 1, Bravo - Event 4, Union - Event 5, Yankee (Bravo Event, Union Event)Graphs
- Jan 7, 1954Memo to M Salisbury, Subject: Commission Action on AEC 597/34 - Joint AEC-DOD Information Plan for Operation CastleCorrespondence
- Jan 9, 1954Operation Order, Commander Task Group 7.3 No. 2-54, USS Curtiss, Castle OperationUnknown
- Jan 31, 1954Memo to P L Hooper, Et Al, Subject: Change No. 2 to Operation Plan 1-53 (Castle Operation)Correspondence
- Jun 9, 1954Incoming Telegram to Secretary of State, Subject: Preparing Invitation to AEC for Toyko Conference on Radioactivity ProblemsCorrespondence
- Jun 10, 1954TWX, Subject: Approval and Commendation of Our Petition Reinforce Our Faith in the US AdministrationCorrespondence
- Jun 16, 1954Letter to DR Walter Claus, Subject: Fallout Data (Castle Operation)Data
- Jun 18, 1954Incoming Telegram to Secretary of State, Subject: Agenda Dealing with Monitoring Tuna, AEC Recommendation to F and D and Toerh Marine Biological Problems with Our Counterparts in JSCCorrespondence
- Jun 28, 1954Letter to J H Liu, Subject: Alleged Instance of Radioactivity Among Food FishCorrespondence
- Mar 1, 1954TWX to T Shipman, Et Al, Subject: Survey Accomplished (Bravo Event, Castle Operation)Correspondence
- Mar 1, 1954Collection Dates and Days After March 1, 1954 (Coconut)Graphs
- Mar 1, 1954Density VS. Altitude - Bravo Event (Meteorological Data)Graphs
- Mar 1, 1954CTJF Advisories, Operation Castle, Shot Bravo (01 March 1954 - 18 May 1954 Est)Correspondence
- Mar 1, 1954TWX, Subject: Local Approval for Following Proposal to Collect and Analyze Urine Samples from Natives and Air Weather Service PersonnelCorrespondence
- Mar 3, 1954TWX to Graves, Subject: Appreciate Prompt Action in Evacuating Affected Islands (Bravo Event, Castle Operation)Correspondence
- Mar 4, 1954TWX to Ogle, Subject: Western Quarters of Lagoon Is Contaminated (Bravo Event, Castle Operation) (Deleted)Correspondence
- Mar 5, 1954TWX to C Dunham, Subject: Medical Team (Operation Castle)Correspondence
- Mar 6, 1954Operation Order CTG 7.3 No. 7-54 (Castle Operation) (Attachment: Annex A. Schedule of Events and MovementsUnknown
- Mar 10, 1954TWX to J C Bugher, Subject: Urine Sample Analysis for Natives and Air Weather Service PersonnelCorrespondence
- Mar 12, 1954TWX to Bradbury, Subject: re Romeo EventCorrespondence
- Mar 16, 1954AEC Meeting No. 967 2:15 P.M., Tuesday, March 16, 1954 - Japanese Fishing Vessel (Castle Operation, Bravo Event, Japanese Fishermen)Meeting minutes
- Mar 18, 1954Letter to Distribution, Subject: Radiological Surveys of Several Marshall Island Atolls (Castle Operation) (Encl: 2 Reports on Soil & Water Samp., Rad. Surv. of Downwind Atolls Contam. by Bravo)Correspondence
- Mar 18, 1954Memo to Distribution, Subject: Radiological Surveys of Several Marshall Island Atolls (3 Encls; Re: Soil & Water Sampling, 3/8 & 3/10/54; Monitoring Atolls Contaminated by Bravo, DTD 3/12/54)Correspondence
- Mar 18, 1954TWX to Ridgway, Et Al, Subject: Quote of Letter to Japanese Minister for Foreign Affairs re Japanese Fishermen Reported Suffering from Injuries Caused by Radiation (Castle Operation) (Deleted)Correspondence
- Mar 19, 1954TWX to J C Bugher, Subject: Japanese Fishing Craft and Fish ConcentrationsCorrespondence
- Mar 27, 1954State Dept Chart No. 1 on Position of Fukuryu Maru from Aide - Memoire of March 27, 1954Data
- Mar 29, 1954Operations Order No. 4-54, Operation Castle (Attach; Annexes a Thru Y)Unknown
- Mar 31, 1954Analysis of Rain and Settled Dust - Brookhaven March 1954 (Castle Operation, World-Wide Fallout)Miscellaneous
- Mar 31, 1954TWX to AEC Chairman, Et Al, Subject: Summary of Survey Party Report (Bravo Event, Castle Operation)Correspondence
- May 1, 1954Incoming Telegram to Secretary of State, Subject: Effect of Current Nuclear Tests on Ocean Currents and Fishing OperationsCorrespondence
- May 7, 1954Meteorlogical Data - Yankke Event, Castle Operation (Measurements Taken by USS Curtiss)Data
- May 15, 1954TWX to Chairman US AEC, Subject: Nectar Plus 36 Hour Advisory (Castle Operation)Correspondence
- May 18, 1954Memo, Subject: in-Cloud Gamma Radiation Exposures for the Single F84G Aircraft (Castle Operation) (Deleted)Correspondence
- May 24, 1954Letter to E O Lawrence, Subject: Official Observers Badge and Certificate of Participation as Momentos of Your Trip to the Pacific Proving Grounds During Operation Castle (No Enclosures)Correspondence
- May 24, 1954Letter to T a Hardison, Subject: " as-Built " Drawings of UCRL Stations for Operation CastleCorrespondence
- May 31, 1954Reference Titles for Photographs - Nectar Event, Operation Castle (Deleted)Data
- Nov 24, 1954Letter to DR Walter Claus, Subject: Relatively Active Fallout Sampler (Castle Operation)Data
- Sep 2, 1954Incoming Telegram to Secretary of State, Subject: Express Official Concern Over Relapse and Critical Condition of Fukuryu Maru CrewmanCorrespondence
- Sep 23, 1954Telegram, Subject: No Japanese Papers Published This Morning Death (Castle Operation, Bravo Event, Japanese Fishermen)Correspondence
- Sep 24, 1954Telegram, Subject: Departments Response re Contribution (Castle Operation, Bravo Event, Japanese Fishermen)Correspondence
- Apr 5, 1955Memo to Commander, Subject: Temporary Duty Personnel (Encl: Temporary Duty Personnel Participating in Operation Castle)Correspondence
- Mar 11, 1955Graph, Activity of Spidersnail, Pteroce, from Belle Island Following Nectar Event May 14, 1954, Operation CastleChart
- Mar 18, 1955Chronology of Events Following Operation Castle Fallout Experience (March 1, to July 29, 1954)Data
- Oct 4, 1956Memo to L L Strauss, Subject: Issuance This Month of Book on Medical Effects of Fallout from the First Shot of the Castle Series (No Attachments)Correspondence
- Dec 31, 1972Long Term Activity Estimates for the Northern Marshall IslandsEstimate sheet
- Dec 3, 1980Hhad Marshall Islands Program (as of December 3, 1980)Conference
- Dec 1, 1981Fact Sheet: Operation CastleData
- UndatedTWX, Subject: re EniwetokCorrespondence
- UndatedNews Release, Island Native Rescheduled for Surgery (Bikini Atoll)News story
- UndatedAtolls Contamination by Fallout (Table) (Marshall Islands) (Deleted)Data
- UndatedMemo to R a Conard, Subject: Medical Surveillance and Treatment for the People of the Rongelap and Utirik AtollsCorrespondence
- UndatedOutline for Discussions Between the U S Energy Research and Development Administration and the Trust Territory of the Pacific Islands Regarding Medical Care of the Rongelap and Utirik PeopleOutline; report
- UndatedU.s. Nuclear TestsMap
- UndatedSummary Sheet, Subject: Action Regarding Payment of Costs of Special Medical Care for Inhabitants of Rongelap and Utirik AtollsSummary
- UndatedBriefing Outline (Background - Nuclear Testing in the Pacific; Issues; Current Status; Problem Areas)Book
- UndatedTWX, Subject: Procurement Awaiting Verification of Requirement from JobsiteCorrespondence
- UndatedTWX, Subject: Program 4, Biomedical Studies as Indicated in Reference Will Be Continued Until CompletionCorrespondence
- UndatedMemo to Bugher, Subject: Inhouse Routing Slip No SubjectCorrespondence
- UndatedTWX, Subject: Crane Hoist Engineering Recommends That Load Brake Be Replaced and Returned for RepairCorrespondence
- UndatedList of Military Contents: Folder Nos. 1 Through 6, Box 2836 Job 2813Data
- UndatedTWX to Chairman AEC, Subject: Successful Detonation of Nectar (Castle Operation)Correspondence
- UndatedProposed Project Summary - Operation Castle (Project Title: Electromagnetis Radiation Calibrations)Legal document
- UndatedHandwritten Memo, Subject: Medical Studies of the Marshall Islands Accidently Exposed to Fallout (Rpis No. 00032)Correspondence
- UndatedTWX to Fields and Bugher, Subject: Request for Complete Information on Intentions with Regard to Proposals on Fallout Project (Nectar Event, Castle Operation)Correspondence
- UndatedTWX, Subject: Operation CastleCorrespondence
- UndatedRequest for Blood Counts on Pink Slips with Attached Work Sheet with Name (Box 2836 Job 2813)Data
- UndatedThe Current Status of Thyroid Disease Among the Marshallese Exposed to Fallout from the Bravo Test, March 1, 1954Data
- UndatedList of Medical Histories of Marshallese PeopleData
Other topics
Trinity Test 17Manhattan Project 65Oppenheimer Security Hearing 16Operation Crossroads 21Operation Sandstone 35Operation Greenhouse 36Operation Ivy 44Operation Upshot-Knothole 32Operation Teapot 22Operation Redwing 75Operation Plumbbob 15Operation Hardtack 82Operation Dominic 5Project Plowshare 23Amchitka Island Tests 3Palomares Incident 31Thule B-52 Crash 54Rocky Flats Plant 56Hanford Site 250Nevada Test Site 76Bikini Atoll 239Enewetak Atoll 250Rongelap and Utirik Fallout 240Human Radiation Experiments 250Project Rover and NERVA 18