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MONTHYEAR05000282/LER-1979-009, Forwards LER 79-009/01T-01979-04-26026 April 1979
Forwards LER 79-009/01T-0
Project stage: Other
ML19224B8331979-04-30030 April 1979
Responds to IE Bulletin 79-06A,Revision 1 Re Revision of Emergency Procedures for Coping W/Transients & Accidents
Project stage: Other
ML19274F0711979-05-0101 May 1979
Amends 36 & 30 to Licenses DPR-42 & DPR-60,respectively, Revising Tech Specs to Require Actuation of Safety Injection Based on 2 Out of 3 Channels of Low Pressurizer Pressure
Project stage: Other
ML19274F0761979-05-0101 May 1979
Notice of Issuance & Availability of Amends 36 & 30 to Licenses DPR-42 & DPR-60,respectively
Project stage: Other
ML19269E8711979-05-18018 May 1979
Responds to IE Bulletin 79-06A, Revision 1. Change to Tech Specs Issued 790501 to Modify Safety Injection Logic to Two Out of Three Low Pressurizer Pressure.Mod of Logic Made 790502 on Unit 1 & 790508 on Unit 2
Project stage: Other
ML19308A3681979-05-22022 May 1979
Forwards Results of Preliminary Review of Licensee Responses to IE Bulletins 79-06,06A & 06,Amend 1.Meeting W/Owners of Operating Plants Having Westinghouse-designed Sys Scheduled for 790530 in Bethesda,Md
Project stage: Meeting
ML19247A2561979-06-22022 June 1979
Responds to Items 1-13 of IE Bulletin 79-06A,Revision 1,& NRC Request for Addl Info.Submits Info Re Emergency Procedures for Coping W/Transients & Accidents, Mod of Pressurizer Pressure & Containment Isolation Sys
Project stage: Request
ML19248D4351979-06-26026 June 1979
Notice of Violation from Insp on 790501-31
Project stage: Other
05000282/LER-1979-019, Notifies of Discrepancy in Design Analyses Performed for Containment Purge Valves.Info Supplements LER 79-019.Valves Will Remain Closed Above Cold Shutdown Conditions Until Closure Can Be Assured1979-07-10010 July 1979
Notifies of Discrepancy in Design Analyses Performed for Containment Purge Valves.Info Supplements LER 79-019.Valves Will Remain Closed Above Cold Shutdown Conditions Until Closure Can Be Assured
Project stage: Supplement
ML19254B4601979-08-29029 August 1979
Responds to IE Bulletin 79-06C, Nuclear Incident at Tmi. Util Pursued Items as Member of Westinghouse Owners Group. Generic Study Applies to Facility
Project stage: Other
ML20009D0121981-07-0808 July 1981
Discusses Review of 790430,0518 & 0622 Responses to IE Bulletin 79-06A & 79-06A,Revision 1.Encl Safety Evaluation Completes TMI Item II.K.1 & Bulletins.Responses to IE Bulletin 79-06C Will Be Reviewed as Part of Item II.K.3.5
Project stage: Approval
ML20009D0151981-07-0808 July 1981
Safety Evaluation Re Applicant Responses to IE Bulletins 79-06A & 79-06A,Revision 1.Actions Taken by Licensee Demonstrate Understanding of Concerns & Implications of TMI-2 Accident
Project stage: Approval
1979-05-22
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Text
NSD NORTHERN STATES POWER COMPANY MIN N E A PO LI S. MIN N E SOTA 55401 May 18, 1979 Mr. James G. Keppler Director - Region III Office of Inspection and Enforcement United States Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
PRAIRIE ISLAND TJCLEAR GENERATING PLAhT Dockets No. 50-282 and No. 50-306 In response to Item 13 of IE Bulletin 79-06A - Revision 1, the following is offered:
Item 13 A change to Technical Specifications was proposed to change safety injection logic to two-out-of-three low pressurizer pressure. The change was issued May 1, 1979. Modification of the logic was made May 2 on Unit 1 and on May 8 on Unit 2.
A setpoint change was implemented raising the interlock setpoint for enabling actuation of the pressurizer power-operated relief valves from 2185 to 2335 psig so that failure of a single pressure channel will not cause valve opening. That is, two channels (instead of one) must provide high pressiire signals for valve actuation.
Yours very truly, L. J.' Wachter L ce President Power Production and System Operation cc:
Mr. G. Charnoff NRC Office of Inspection and Enforcement Washington, D.C.f}
))j J 211979 7006290 M I
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