Letter Sequence Approval |
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MONTHYEARML20235Z4081987-10-16016 October 1987
Summary of Operating Reactors Events Meeting 87-35 on 871013.List of Attendees,Events Discussed,Significant Elements of Events & Summary of Reactor Scrams & Comparison of Wk Statistics W/Industry Averages Encl
Project stage: Meeting
ML13319A7911987-10-16016 October 1987
Forwards Description of ESF Single Failure Analysis,Per NRC 860923 Request,Resulting from 860730 Failure of PT-59 Which Identified Single Failure Susceptibility of Reactor Protection Sys.Final Rept Will Be Submitted by 871106
Project stage: Other
ML13336A0441987-10-20020 October 1987
Summary of 871009 Meeting W/Util in Bethesda,Md Re Licensee Identified Possible Failure in ESF Equipment.List of Attendees & Slides Used by Licensee Encl
Project stage: Meeting
ML13333A5941987-12-0101 December 1987
Forwards Revised Better Estimate Analysis for Cases 5 & 6 to Support Justification for Continued Operation for Remainder of Cycle.Better Estimate Analysis for Core Response During Main Steam Line Break (Cases 5 & 6) Also Encl
Project stage: Other
ML13333A6031987-12-0202 December 1987
Forwards Safety Evaluation Accepting Util 871016 Single Failures Analysis for Esf,Per 871009 Meeting.Justification for Interim Plant Operation Acceptable Until 871214,pending Further Analysis
Project stage: Approval
ML13333A6081987-12-0202 December 1987
Safety Evaluation Re Single Electrical Failures Affecting safety-related Function of Esfs.Util 871016 Justification for Continued Plant Operation Acceptable Until 871214. Operation Beyond 871214 Must Be Supported by Addl Analyses
Project stage: Approval
ML13333A6001987-12-0808 December 1987
Provides Addl Info Re ESF Single Failure Analysis,Including Discussion of Method Used to Determine Min Acceptable DNBR Applicable for Macbeth Correlation at Sys Pressures Established by Analysis,Per 871204 Request.Graph Also Encl
Project stage: Other
ML13333A6141987-12-0909 December 1987
Forwards Proprietary ESF Single Failure Analysis Re Min Value of Dnbr.Proprietary Calculation of DNBR & Supporting Affidavit Withheld (Ref 10CFR2.790)
Project stage: Other
ML13333A6321987-12-11011 December 1987
Safety Evaluation Supporting Util Justification for Interim Plant Operation Re ESF Single Failure Vulnerability
Project stage: Approval
ML13333A6271987-12-11011 December 1987
Forwards Safety Evaluation Re Util 871016 Submittal of ESFs Single Failure Analyses & 871201,08 & 09 Submittals of Analyses Justifying Operation of Plant for Remainder of Current Operating Cycle.Justification Acceptable
Project stage: Approval
ML13331B0101988-02-19019 February 1988
Forwards Fee for 871016 Application for Review of Justification for ESFs Single Failure Analysis,Per 880127 Request
Project stage: Request
ML13331B0581988-07-19019 July 1988
Advises That Calculation CAW-87-130 Will Be Withheld from Public Disclosure Per 10CFR2.790(b)(5) & Section 103(b) of Atomic Energy Act of 1954,per 871209 Request
Project stage: Other
ML13336A0991988-07-27027 July 1988
Confirms Discussions on Closeout of Event 10237 Re Newly Discovered ESF Single Failure Vulnerability Reported on 871007.Final Review of Longer Term Corrective Action Being Conducted Under Tac 66624
Project stage: Approval
1987-12-02
[Table View] |
Text
July 27, 1988 MEMORANDUM FOR:
W. Lanning, Chief Events Assessment Branch Division of Operational Events Assessment FROM:
George W. Knighton, Director Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects
SUBJECT:
CLOSE-OUT OF EVENT NO. 10237 SAN ONOFRE UNIT 1 Confirming our discussions on the subject of a newly-discovered ESF single failure vulnerability at San Onofre 1 reported on October 7, 1987 (and tracked by you as event no. 10237), final review of longer-term corrective action is being conducted by the ICSB, PSB, and RSB under Tac No. 66624. The review will be completed before the next refueling on or about October 1, 1988.
Therefore, we believe this matter should be considered closed with respect to any further follow-up by the Events Assessment Branch.
Harry Rood for George W. Knighton, Director Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects cc: D. Oudinot S. Rhow C. Liang N. Wagner C. Trammell DISTRIBUTION Docke t M E NRC & Local PDRs PD5 Reading CMTrammell GWKnighton JLee V
DRSP/D:PDV A
DR SP rmmell:dr TWKnighton GM aan DMCr field 788 7/88 8/
/8 FFICIAL RECORD COPY 8608100221 880727 PDR ADOCK 05000206' P
PNU
- REG UNITED STATES NUCLEAR REGULATORY COMMISSION 9
WASHINGTON, D. C. 20555 July 27, 1988 MEMORANDUM FOR:
W. Lanning, Chief Events Assessment Branch Division of Operational Events Assessment FROM:
George W. Knighton, Director Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects
SUBJECT:
CLOSE-OUT OF EVENT NO. 10237 SAN ONOFRE UNIT 1 Confirming our discussions on the subject of a newly-discovered ESF single failure vulnerability at San Onofre 1 reported on October 7, 1987 (and tracked by you as event no. 10237), final review of longer-term corrective action is being conducted by the ICSB, PSB, and RSB under Tac No. 66624. The review will be completed before the next refueling on or about October 1, 1988.
Therefore, we believe this matter should be considered closed with respect to any further follow-up by the Events Assessment Branch.
George W. Knighton, Director Project Directorate V Division of Reactor Projects -
- III, IV, V and Special Projects cc: D. Oudinot S. Rhow C. Liang N. Wagner C. Trammell
