ML20070R132

Responds to 820920 Request for Addl Info Re Containment Isolation Design Criteria for Instrument Lines Penetrating Primary Containment.All NSSS & Balance of Plant Instruments, Except static-O-ring,can Withstand Earthquakes

ML20070R132
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	01/24/1983
From:	James Smith LONG ISLAND LIGHTING CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
SNRC-825, NUDOCS 8301270296
Download: ML20070R132 (2)

Text

~' ~ '

r

~\

PO gg LONG ISLAND LIGHTING COM PANY awaw.*r/w  ! SHOREHAM NUCLEAR POWER STATION P.O. BOX 618, NORTH COUNTRY ROAD e WADING RIVER, N.Y.11791 January 24, 1983 SNRC-825 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Containment Isolation-Instrument Lines Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Reference:

NRC letter (A. Schwencer) to LILCO (M. S. Pollock) dated September 20, 1982, " Request for Additional Information - Shoreham Nuclear Power Station"

Dear Mr. Denton:

Based upon the above referenced letter and subsequent conversations with members of your staff on the subject of Shoreham's capability to meet containment isolation design criteria for certain of its instrument lines penetrating primary containment, the following clarifications are provided.

All NSSS cnd BOP instruments (including instrument internal pressure boundary), sensing lines, and standpipes identified as being an extension of the primary containment boundary and therefore subject to the provisions of GDC's 55 and 56, have been determined to be capable of maintaining pressure boundary integrity during and follow-ing Design Basis events concurrent with a seismic event, with the exception of a static-o-ring for pressure switch 1T49-PS085. This instrument does not provide a safety function and has its own manual isolation valve. Until compliance with the above criteria can be demonstrated, the individual manual isolation valve upstream of the instrument will be maintained normally closed and procedurally con-trolled. It is expected that upon receipt of vendor information, it will be demonstrated that this item conforms to the above referenced criteria.

bol r301270296 830124

'PDR ADOCK 050003g2 A

J

i V, 4 \

January 24, 1983 i SNRC-825 l

- Page 2' All.NSSS and BOP _1nstruments'(including instrument internal pressure

' boundary), sensing lines and standpipes, which.are potential leakage paths from the primary containment, were included in-the 10CFR50, Appendix J, Type A leak rate test boundary,.except instruments 1T49-PDT029,' PIT 032, PS085 and lZ93*LT012A, B, which were isolated '

and vented. Instruments 1T49-PDT029, PIT 032.and PSO85 are all located on a common manifold which will be tested separately for.

its leakage rate. Instruments lZ93*LT012A, B will be. tested for their individual leakage rates. These leakage rates will be included in the' Appendix'J, Type A.overall leak rate test. report.

It is-our understanding that, subject to the above clarifications, the present plant configuration is acceptable through the first refueling. outage. If you have any further questicns on this issue, pleese feel free to contact this office.

. Very-truly yours,

/

J. L. Smith Manager, Special Projects Shoreham Nuclear Power Station.

DD:mp cc: J. Higgins

'All parties l

t a c -

N t

q

.]

~~