ML20067D983
| ML20067D983 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 02/07/1991 |
| From: | Morgan W COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| ZNLD745-4, NUDOCS 9102130379 | |
| Download: ML20067D983 (2) | |
Text
-..
Ccmmcnwealth Ediscn
(-
1400 Opus Place l*
Downers Grove, Illinois 60515 s
February 7,1991 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555
Subject:
LaSaile County Station Units 1 and 2 Supplement to in service Testing Program Relief Request RV 57 NRC Do.cket Nos. 50-353 and 50 3.54
Reference:
(a) W.E. Morgan letter to NRC dated June 7,1990.
Dear Sir:
Reference (a) submitted Commonwealth Edison's LaSalle County Station in-service Testing Program Relief Request RV-57. Relief was requested for the Emergency Fuel Pool Makeup Crosstle Vent Valves because the necessary testing required by ASME Section XI,1980 Edition through Winter '80' Addenda, could not be performed.
Upon review of this request by your staff, additionallnformation was requested.
l The following attachment provideo the requested information.
Please direct any questions you may have regarding this matter to this office.
l Very truly yours,
[
UU)yLb U
M Nuclear Lice @nsing Administrator W.
. Morgan L
l-cc:
J. Hickman - Pro. ect Manager, NRR L
Senior Resident nspector - LSCS
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'JSALLE COUNTY STATION UNIT 41 and 2 page 1 of 1 j
VALVE RELIEF REQUEST /
Q PROVAL / REFERENCE DOCUMENT (S): DRAFT COLD SHUTDOWN JUST!r! CAT!DN: RV-57
- 1. OSR40-17
- 2. OSR-91-04 AFFECTED COM?0P O T(a):
i COMDONENT EPN CLASS / CCTEGODY FUNCTION 1(2)E12-F037 3 / B Fuel Dool Emergency Makeup Crosstie Vent ASME SECT!DN I! TEST REQUIREMENT: Stroke Time power Operated Valves, IW-3413 i
BASIS FOR RELIEF:
The emergency fuel pool makeup system provides an emergency source of water to the fuel pool and also provides containment flooding water for post accident recovery. To prevent inadvertent injection of lake water into the reactor or spect fuel pool, spool pieces are installed on the outlet of the ewergency makeup pumps for isolation. These spool pieces are located in the DG/ AUX building and installed in case of an accident.
The 'B' fuel pool emergency makeup pump will supply water for containment floodup or a maximum of 300 gpm of emergency makeup water to the fuel pool. Wen the 'B' fuel pool emergency makeup pump is utilized for containment flooding, it is not available for fuel pool makeup. If makeup water was required for the fuel pool at the same time containment flooding was in progress, the ' A' fuel pool emergency makeup pump could be used to supply water to the fuel pool.
The cr"g=ey mahp the for containment flooding is connected to the 'B' residual heat rencval loop i
via two normally closed noter operated gate valves (F093 and F094) and a testable check valve (F089).
l The F097 is a solenoid operated valve installed in the vent line between the F093 and F094 valves.
Valve F097 is small (.075'), the-efore flow loss thru the F097 valve and associated vent line would be minimal if this valve would fail open during containment floodup. The F097 valve does not have a control switch and is interlocked with the control switches of F093 and FOM. Each control switch has a ecntact in series with the solenoid of the F097 valve. Theses contacts close when the associated control switch is in the closed position. S en the control switches for F093 and F094 are closed, the F097 valve will open. If the control switch for F093 and/or F094 is open, the F097 valve will close.
There are no position irdicator switches that provide for remote indication of valve position.
Therefore, there is no may to stroke time the valve. Furthermore, there is no specific required functional value of full-stroke time for the valvel as long as the valve closes, its function is l
demonstrated.
I I
l ALTERNATIVE TEST:
Perform an exercise test on a cuarterly basis per IW-3312 to verify valve cperability.
!