Letter Sequence Other |
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Results
Other: 05000266/LER-1979-010-01, /01T-0 on 790620:plant Safeguards Actuation Circuitry Review Indicated Need for Circuitry Changes.Caused by Changes in IEEE Std Since Plant Design.Mods to Four Applicable Safeguard Circuits Will Be Performed, ML19210C482, ML19242D259, ML19253A712, ML19253B006, ML19257A367, ML19257B511, ML19289C679, ML19310A971, ML19323H481, ML19345H544, ML20010E141, ML20027A527, ML20038C635, ML20039A258, ML20040F029, ML20065R665
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MONTHYEARML20027A5271978-11-28028 November 1978
Discusses Possible Dangers of LOCA in Containment Purging During Normal Plant Oper.Requests Either Commitment to Limit Purging or Justification for Continuing.W/Encl ANO 7812080207
Project stage: Other
ML19289C6791979-01-16016 January 1979
Responds to Re Purging During Normal Operation. Need for Purging Has Been Limited,But It Is Essential That Capability of in-containment Activities at Power Be Maintained
Project stage: Other
05000266/LER-1979-010-01, /01T-0 on 790620:plant Safeguards Actuation Circuitry Review Indicated Need for Circuitry Changes.Caused by Changes in IEEE Std Since Plant Design.Mods to Four Applicable Safeguard Circuits Will Be Performed1979-07-0303 July 1979
/01T-0 on 790620:plant Safeguards Actuation Circuitry Review Indicated Need for Circuitry Changes.Caused by Changes in IEEE Std Since Plant Design.Mods to Four Applicable Safeguard Circuits Will Be Performed
Project stage: Other
ML19253A7121979-08-0808 August 1979
Confirms Action Taken as Result of 790803 Telcon Re Util Request to Leave Containment Purge Values Closed Above Cold Shutdown Condition.Proposal Acceptable on one-time Basis
Project stage: Other
ML19242D2591979-08-10010 August 1979
Appreciates Prompt Approval of Request to Purge Containment. Approval Reduced Personnel Inconvenience & man-rem Exposure. Will Pursue Review of Containment Purge Sys
Project stage: Other
ML19253B0061979-09-0606 September 1979
Discusses Containment Purge Valve Operations.Notifies of Potential Mods to Ensure That Valves Will Close Against Containment Pressure Transients.Consultants Will Conduct Studies & Analyses of Potential Mods
Project stage: Other
ML19323H4811979-09-30030 September 1979
Technical Evaluation of Electrical Instrumentation & Control Design Aspects of Override Containment Purge Valve Isolation & Other Engineered Safety Feature Signals for Point Beach Nuclear Power Station,Units 1 & 2
Project stage: Other
ML19210C4821979-11-0101 November 1979
Responds to Re Guidelines for Operability of Containment Purging & Venting Valves During Normal Operations.Evaluation Will Consider Consultant Studies of Potential Mods to Valves
Project stage: Other
ML19257A3671979-11-19019 November 1979
Forwards Interim Position on Containment Purging & Venting During Normal Operation Pending Resolution of Isolation Valve Operability.Commitment to Comply W/Encl Position Should Be Submitted within 45 Days
Project stage: Other
ML19310A9711979-12-27027 December 1979
Requests Preliminary Evaluation of Licensee Response to NRC 791023 Interim Position for Containment Purge & Vent Valve Operation Pending Resolution of Isolation Valve Operability, Generic Item B-24.Evaluation Form Encl
Project stage: Other
ML19257B5111980-01-0909 January 1980
Provides Commitments Sought in NRC .Forwards to Bechtel Re Purge Valve Capability Verification.Nrc Guidelines Will Be Considered During Evaluation of Mods for Improved Purge Valve Reliability
Project stage: Other
ML19257C8081980-01-11011 January 1980
Forwards Safety Evaluation to Be Substituted for Encl in Ltr Per Agreement Reached at 791213 Meeting Re Containment Purge
Project stage: Approval
ML19257C8101980-01-11011 January 1980
Safety Evaluation Approving Electrical,Instrumentation & Control Design Aspects of Override of Containment Purge Valve Isolation,Except Radiation Monitors Used to Initiate Containment Purge Isolation
Project stage: Approval
ML19323H4781980-05-22022 May 1980
Forwards Safety Evaluation Supporting Design Aspects of Containment Purge Valve Isolation Override & Other Engineered Safety Feature Actuation Signals Except Radiation Monitors Which Initiate Containment Purge Isolation
Project stage: Approval
ML19345H5441981-05-0707 May 1981
Documents Basis for Containment Isolation Pressure Setpoint Reported in Item II.E.4.2 of NUREG-0737 Response Per NRC 810414 Telcon.Present 5 Psig Setpoint Considered Realistic & Appropriate
Project stage: Other
ML20008F4471981-07-21021 July 1981
IE Info Notice 81-21, Potential Loss of Direct Access to Ultimate Heat Sink. Provides Addl Info to IE Bulletin 81-03
Project stage: Request
ML20038C6351981-07-31031 July 1981
Srp,Revision 2 to Section 6.2.4, Containment Isolation Sys
Project stage: Other
ML20010E1411981-08-28028 August 1981
Proposed Tech Spec Revision Pages 15.3.6-2,15.3.6-3, 15.4.4-12,15.4.4-15 & 15.4.4-15a Re Testing of Containment Purge Supply & Exhaust Sys Isolation Valves
Project stage: Other
ML20010E1361981-08-28028 August 1981
Application for Amend to Licenses DPR-24 & DPR-27 Submitted as Tech Spec Change Request 68 to Incorporate Addl Restrictions Re Use & Testing of Containment Purge Supply & Exhaust Sys Isolation Valves,Per NRC Request
Project stage: Request
ML20033C0321981-11-23023 November 1981
Second Discovery Progress Rept for Period Ending 811122,per ASLB 811113 Memorandum Order.Licensee 811027 Responses to Wi Environ Decade 811023 Interrogatories Are Not Fully Responsive.Certificate of Svc Encl.Related Correspondence
Project stage: Request
ML20039B0181981-11-24024 November 1981
Requests That Util Remit Class III Fee for Unit 1 & Class I Fee for Unit 2 to Cover Review of 810828 Application for Tech Spec Changes Re Containment Purge Valve Operability
Project stage: Approval
ML20033A9071981-11-24024 November 1981
Advises of Significant Error in 811117 Telcon Transcript
Project stage: Request
ML20039A2581981-12-0707 December 1981
Requests That NRC Reconsider Requirement of Class III Approval Fee During Final Review Re Tech Spec Change Request 68.Changes to Tech Specs Result of NRC Request.No Approval Fee for Amend Review Necessary
Project stage: Other
ML20040F0291982-01-28028 January 1982
Proposed Tech Spec 15.3.6 Re Containment Purge Supply & Exhaust Valves
Project stage: Other
ML20040F0221982-01-28028 January 1982
Application for Amend to Licenses DPR-24 & DPR-27,consisting of Tech Spec Change Request 68 Re Containment Purge Valve Operability
Project stage: Request
ML20065R6651982-10-22022 October 1982
Provides Results of Confirmatory Analysis Demonstrating That Unacceptable Radioactive Release from Containment Would Not Take Place as Result of Small Break LOCA in Which Operator Action Required.Radioactive Release Negligible
Project stage: Other
1980-01-11
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O wisconsin Electnc powen coursur 231 W. MICHIGAN, P.O. BOX 2046, MILWAUKEE, WI 53201 January 9, 1980 Mr. Harold R.
Denton, Director Office of Nuclear Reactor Regulation U.
S. NUCLEAR REGULATORY COMMISSION Washington, D.
C.
20555 Attention:
Mr.
A.
Schwencer, Chief Operating Reactors Branch 1 Gentlemen:
DOCKET NOS. 50-266 AND 50-301 CONTAINMENT PURGING AND VENTING DURING OPERATION POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2 Your letter dated Ncvember 19, 1979 requested that we provide an additional interim commitment to operate the containment purge and vent valves at the Point Beach Nuclear Plant in conformance with the interim position provided with that letter.
This is to confirm the additional interim commitment you requested.
Your letter also requested that we provide information which demonstrates that a program has been initiated to verify purge and vent valve operability on an expedited basis.
Attached is a copy of our letter to Bechtel Power Corporation dated September 17, 1979 requesting that they verify purge valve capabilities.
In addition, by letter dated November 1, 1979 we committed to consider the guide-lines for valve qualification prograns, provided with your letter dated September 27, 1979, daring our evaluation of modifications for improved purge valve reliability.
We trust these commitments will satisfy your request.
Should you desire additional information regarding this topic, please contact us.
Very truly yours, M
O 3
Sol Burstein Exec tive Vice. President Subscribed and sworn to before me this 9th day of January, 1980.
u an wh-j766 308' M3' Notary Public, State of Wisconsin 3
L2 9 / #74.
/
My Commission expires -
n 80 1160
$l3 F
0
I WISCONSIN Elecinc ma coumr 231 W. MICHIGAN, P.o. BOX 2046, MILWAUKEE, wi 53201 September 17, 1979 BECHTEL PO'!ER CORPORATION Fifty Beale Street San Francisco, California 94119 Attention: Mr. E J. O'Connell Vice President
(
Gentlemen:
REQUEST F0tt PERFOR;WiCE OF TECICIICAL SERVICES C0afAI..atai Puhtit VALVL n..nLtLIS PJInf BEACH..UCLtM PLoul Please use this letter as your authority to provide technical cervices as described below. The work shall be perfo ed t.ader tne Agreement for Continuing Technical Services, f:o. 22A72, dated Jar.oary 1, 1973 and Amendment 11o.1 effective Deceaber 31, 1977.
In response to a lette* 9f Itovember 23,1973 from the Nuclear Regulatory Connission, we 1:ivestigsted the capability of the containment purge inlet and outlet valves to close from the fully open positica in the event of a loss of coolant accident.
Discussions with the manufacturer
(
of the valves indicated that the valves might not wf thstand the closure force during the containment pressure transient following an accident.
However, if the valves are operated partially open, manufacturer s data d
indicate that the valves could withstand the closing forces, and would perfom their intended function. We request that Bachtel perfora the following analyses to verify purge valve capability:
1.
Detemine the forces on the valve disc as a function of time and differential pressure during the accident.
2.
Detemine the capability of the valves a ad valve opera-tors to withstand these forces and defira! problem areas.
3.
If the valves cannot close from the fully open position, detemine the partially open position from which the valves can close.
4.
Detemine the flow rates at partial valve openings during nomal pu Ging operations.
1766'309
/
P.r. E. J. O'Connell - Page Two 5.
Review ductuork and fan design to assure operability during normal punjing with partially closed valves.
6.
Provide design nodifications, if necessary, to allow purging with partially closed valves.
7.
Investigate the potential for replaceuent or redesign of the valve to ensure capability to close from the full open position.
All work shall be QA scope, according to the provisions of QA Manual Pul0447. 'le request that you assign a separate job order nunber for this work.
Please refer to your rir. D.11. Clark's letter of April 25, 1979, regarding estinated manhours and schedule for cocpleting this work.
Very truly yours, b
h c'h C. N. Peters, Director Purchasing and Stores Copy to 11r. D.11. Clark 1766 310
