Letter Sequence Other |
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Results
Other: ML19290F175, ML19309E293, ML19309F675, ML19309G820, ML19312D649, ML19320C939, ML19322E558, ML19322E568, ML19323B469, ML19345B402, ML19347D269, ML19347E607, ML20008F619, ML20054F303, ML20126D163
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MONTHYEARML19241C2491979-07-0202 July 1979
Safety Evaluation Rept Re Licensee Compliance W/Nrc 790516 Order.Requirements of Order Were Fulfilled.Plant May Resume operations.Long-term Mod Must Be Completed
Project stage: Approval
ML19241C2481979-07-0606 July 1979
Draft Ltr Re NRC 790516 Order Requiring Increase in Capability & Reliability of Plant to Respond to Various Transient Events.Plant May Resume Operations.Schedule for long-term Mod Will Be Forwarded within 30 Days
Project stage: Draft Other
ML19290E4671980-02-27027 February 1980
Transcript of 800227 Morning Briefing in Washington,Dc Re Event at Crystal River.Pp 1-74
Project stage: Request
ML19312D0651980-02-29029 February 1980
Notification of 800304 Meeting W/B&W Licensees & Util in Bethesda,Md to Hear Presentation by Util Re 800226 Incident
Project stage: Meeting
ML19312D6491980-02-29029 February 1980
Responds to IE Bulletin 79-27, Loss of Non-Class IE Instrumentation & Control Power Sys Bus During Operation. Addl Time Is Required to Complete Review & Evaluation of non-class IE Instrumentation & Control Power Sys
Project stage: Other
ML19322E5681980-03-0606 March 1980
Ltr to All B&W Reactor Licensees Requesting Responses to IE Bulletin 79-27,Items 1-7.Responses to Items 1-5 Should Be Submitted by 800312.Responses to Items 6 & 7 Should Be Submitted by 800317
Project stage: Other
ML19322E5581980-03-0606 March 1980
Forwards NRC Sent to B&W-designed Reactor Licensees,Requesting Info Re 800226 Transient
Project stage: Other
ML19290E8971980-03-12012 March 1980
Forwards Responses to NRC 800306 Request for Info Re Recent Transient.Util Will Perform Tests to Verify Remaining Info Following Nni/Ics Power Upsets.Will Verify That Operator Has Available Major Plant Parameters Identified in Response 4
Project stage: Request
ML20126C6521980-03-13013 March 1980
Summary of 800304 Meeting W/Util,B&W Licensees Re Facility 800226 Nonnuclear Instrumentation Power Supply Failure Resulting in 43,000 Gallons of Coolant Escaping Primary Coolant Sys Into Reactor Bldg.Supporting Documentation Encl
Project stage: Meeting
ML19290F1751980-03-17017 March 1980
Forwards Response to Items 6 & 7 of Re Crystal River Unit 3 Incident.Corrective Action Plan Submitted 800312.Restart Projected for May 1980
Project stage: Other
ML19312D4261980-03-24024 March 1980
Forwards Commitments Re Loss of Instrumentation Discussed During 800318 Meeting W/Nrc.Commits to Take Action to Allow Operator to Control Various Combinations of Loss of Instrumentation & Control Functions Prior to Restart
Project stage: Meeting
ML19309D4391980-03-24024 March 1980
Forwards Proposed Changes to Tech Specs,App a
Project stage: Request
ML19309E2931980-03-26026 March 1980
Updates 800229 Response to IE Bulletin 79-27.Util Will Complete Review & Evaluation of Non-Class IE Instrumentation & Control Sys as Required by Bulletin.Rept Will Be Submitted by 800426
Project stage: Other
ML20126D1631980-04-0101 April 1980
Forwards Annotated Sequence of 800226 Events & Simplified Electrical Circuitry Schematics Per 800227 Request
Project stage: Other
ML19309G8201980-04-14014 April 1980
Confirmatory Order Re Util 800324 & 26 Commitments to Implement Actions Prior to Restart & to Respond to IE Bulletin 79-27 by 800426
Project stage: Other
ML19309F6751980-04-25025 April 1980
Forwards Response to IE Bulletin 79-27, Loss of Non-Class IE Instrumentation & Control Power Sys Bus During Operation. Equipment Necessary for Cold Shutdown Available
Project stage: Other
ML19323C1221980-05-0202 May 1980
Forwards Request for Addl Info for Safety Evaluation Re 800226 Incident at Facility.Includes Info Re Mods Which Validate Info Provided by Indicators During Power Loss Situation
Project stage: Approval
ML19312D8521980-05-0202 May 1980
Forwards Response to Part I of NRC 800502 Request for Addl Info Re Restart After 800226 Accident.Util Is Installing Redundant Indicators Above Intercommunication Sys Section of Control Board.Part II Responses Will Follow
Project stage: Request
ML19323B4691980-05-0606 May 1980
Summarizes Background,Status & Future Plans Re Changes in Main Steam Line Rupture Matrix Sys,Safety Task Force Priority Item 51.Includes Description & Justification of short-term Change & Conclusions
Project stage: Other
ML19320A8541980-06-25025 June 1980
Responds to NRC 800502 Request for Info Re Pressurizer Safety Valves.Includes Data Taken During 800226 Incident to Assist in Determining Flow Rates & Conditioners in RCV-8 Relief Train.Test Results Will Be Sent When Available
Project stage: Request
ML19320C9391980-07-16016 July 1980
Advises That Restart W/O Completion of Item 51 Is Justified,As Original FSAR Is Still Valid for Present Design.All Items Will Be Completed Prior to Mode 2 Operation.Affidavit Encl
Project stage: Other
ML19330A9791980-07-18018 July 1980
Forwards Safety Evaluation Re 800226 Incident.Corrective Actions Taken Are Sufficient to Permit Restart & to Ensure Safe Operation
Project stage: Approval
ML19330A9821980-07-18018 July 1980
Safety Evaluation of Corrective Action Following 800226 Incident.Actions Taken Are Sufficient to Permit Restart
Project stage: Approval
ML19345B4021980-11-26026 November 1980
Forwards Nonproprietary Version of Nuclear Safety Review Task Force, Final Rept.Nuclear Safety Task Force Was Established to Identify Areas That Indicate Potential for Improvement in Safety of Facility
Project stage: Other
ML19347D2691981-03-0606 March 1981
Submits Nuclear Safety Task Force Recommendations Which Will Be Resolved in 1981.Schedule & Resources Estimate 1981 for Resolution of Recommendations in Category 7 Will Be Submitted by 810417
Project stage: Other
ML20008F6191981-04-16016 April 1981
Forwards Schedule & Resources Estimate for Nuclear Safety Task Force Recommendations.Detailed Schedule Provided Re Completion of Engineering Studies Identified in Util
Project stage: Other
ML19347E6071981-04-30030 April 1981
Evaluation of Crystal River Nuclear Power Station
Project stage: Other
ML20054F3031982-06-11011 June 1982
Submits Status of Engineering Studies Resulting from Nuclear Safety Task Force Recommendations Re 800226 Transient
Project stage: Other
1980-04-01
[Table View] |
Text
t& f L l.] l k
)
.L l*
_a ma ase 8
0, UNITED STATES E
NUCLEAR REGULATORY COMMISSION
- E WASHINGTON D.C.20066 e
s.,*****/
March 6, 1980 MEMORAN01.M FOR: Chairman Ahearne Comissioner Gilinsky Comissioner Kennedy Comissioner Hendrie Comissio..er Bradford h
THRU; Executive Director for Operations FRCM:
Harold R. Denton, Director Office of Nuclear Reactor Regulation
SUBJECT:
CRYSTAL RIVER 3 TRANSIENT OF FEBRUARY 26, 1980 As you know NRR and IE held a meeting on March 4,1980 with representatives of all B8W-designed operating reactors to discuss the Crystal River transient of February 26. Crystal River reprcsentatives discussed the sequence of
. events and their preliminary conclusions concerning corrective actions they plan to take (see Enclosure 1).
~ As' a result of these discussions, NP.R issued'a letter to the licensees of these reactors requesting certain information pursuant to 10 CFR 50.54f of the Comission's regulations by c.o.b. March 12 and 17,1980 (see Enc!asure 2). The latter date was chosen to permit the licensees to take into account a report expected to be issued next week by the industry's Institute of Nuclear Power Operations and the Nuclear Safety Analysis Center on the event, including recomended corrective acti s.
t.
Harold R. DentonT0irector Office of Nuclear Reactor Regulation
Enclosures:
As stated cc: OGC PE l
SECY 1
i p
80one 80 3 79
e' PLANNED CORRECTIVE C ION AT CR-3 Imedia t?
Thorough testing of NNI system to determine cause of failure Modify PORV so that NNI failure closes valve Modify pressuriz" spray valve so that valve doesn't open on NNI failure Provide positive indication of all three relief or safety valves Establish procedural control of NNI Selector switches Train all operators in response to NN! failures Move 120v ICS "X" power to vital bus Initiate more extensive program for events recorder system Provide operator with redundant indication of main plant parameters At Next Refueling ('eotenber 1980)
S Install indication lights on all panels to know if power on panel Quick access to: fuses is being designed into cabinets Modify EFW pump circuit to start pumps on any low steam generator level signal Long Term Investigate upgrade of NN! capabilities - total loss of NNI Remote shutdown is being designed Provide backup AC sources to inverters with automatic transfer.
.
