LR-N990254, Forwards Suppl Info Re GL 95-07, Pressure Locking & Thermal Binding of Safety Related Power Operated Gate Valves. Encl Contains Methodology Used in Determination of Pressure Locking Susceptibility of PORVs Block Valves
| ML18107A330 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 05/24/1999 |
| From: | Eric Simpson Public Service Enterprise Group |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML18107A331 | List: |
| References | |
| GL-95-07, GL-95-7, LR-N990254, NUDOCS 9906020086 | |
| Download: ML18107A330 (3) | |
Text
Public Service Electric and Gas Company E. C. Simpson Public Service Electric and Gas Company Senior Vice President - Nuclear Engineering P.O. Box 236, Hancocks Bridge, NJ 08038 MY341999 LR-N990254 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
- SUPPLEMENTAL INFORMATION GENERIC LETTER 95 "PRESSURE LOCKING AND THERMAL BINDING OF SAFETY RELATED POWER OPERATED GATE VALVES" SALEM GENERATING STATION UNITS 1 AND 2 FACILITY OPERATING LICENSES DPR-70 AND DPR-75 DOCKET NOS. 50-272 AND 50-311 Ladies and Gentlemen:
609-339-1700 By "LR-N970540, Forwards Response to 970610 RAI Re Utils Response to GL 95-07, Pressure Locking & [[Topic" contains a listed "[" character as part of the property label and has therefore been classified as invalid. of Safety-Related Power Operated Gate Valves. Validated Results Re Valve Susceptability to Pressure Locking Thermal Binding,Provided|letter dated August 22, 1997]], Public Service Electric and Gas (PSE&G) responded to the Nuclear Regulatory Commission (NRG) Staff request for additional information.
This letter provides additional supplemental information as discussed on May 12, 1999.
Specifically, Attachments I and II to this letter contain the methodology used in the determination of the pressure locking susceptibility of the power operated relief valves (PORV) block valves. Opening Force Required to Overcome Pressure Locking of Pressurizer Block Valves 1PR6, 1PR7, 2PR6, and 2PR7 (MPR Calcualtion No.108-173-EJM-01) is contained in Attachment I, Evaluation of MOVs PR6 and PR? for Pressure Locking During Gradual Depressurization Event (MPR Calculation No. 198-193-TW4) is contained in Attachment II.
Additionally, in the attachment to the "LR-N970540, Forwards Response to 970610 RAI Re Utils Response to GL 95-07, Pressure Locking & [[Topic" contains a listed "[" character as part of the property label and has therefore been classified as invalid. of Safety-Related Power Operated Gate Valves. Validated Results Re Valve Susceptability to Pressure Locking Thermal Binding,Provided|August 22, 1997 letter]], relative to PSE&G's follow-up response to questions# 3, PSE&G stated, in part, that:
".. The valve is closed to perform stroke time test or remote position indication verification. Due to the short duration the valve is in the closed position, pressure locking and thermal binding are not of concern."
Although this statement can be interpreted to indicate that PSE&G does not enter the applicable Technical Specification when stroking these valves, applicable Technical Specifications are followed while these valves are closed. This requirement is clearly stated in the lnservice Testing Safety Injection Valves procedure for both Salem Units 1 and 2.
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Document Control Desk tR-N990254 These issues were discussed between members of my staff and NRC personnel on May 12, 1999. Should you have any questions or comments ori this transmittal, please contact us.
Attachments (2)
Mr. Hubert J. Miller, Administrator - Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. P. D. Milano, Licensing Project Manager -Salem
. U.S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 14E21 Rockville, MD 20852 Mr. S. Morris (X24)
USNRC Senior Resident Inspector Salem Generating Station Mr.K. Tosch, Manager, IV Bureau of Nuclear Engineering 33 Arctic Parkway CN415 Trenton, NJ 08625 95-4933
REF: LR-N990254
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STATE OF NEW JERSEY)
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COUNTY OF SALEM
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E. C. Simpson, being duly sworn according to law deposes and says:
I am Senior Vice President - Nuclear Engineering of Public Service Electric and Gas Company, and as such, I find the matters set forth in the above referenced letter, concerning the Salem Generating Stations, are true to the best of my knowledge, information and belief.
Subscribed and S~efore. me thisd?4 i-A day"'
CUrf11999 My Commission expires on J