ML20076H399
| ML20076H399 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 10/11/1994 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| REF-GTECI-093, REF-GTECI-NI, TASK-093, TASK-93, TASK-OR GL-88-03, GL-88-3, IEB-85-001, IEB-85-1, TAC-M67223, ULNRC-3085, NUDOCS 9410210185 | |
| Download: ML20076H399 (3) | |
Text
1901 C%:vni tems
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Prt OtMe % 1G St va: Ur n Gy ~
314 'M M50 UnrON Donald F Schnell Etscruic
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Octoher 11, 1994
~
U.S.
Nuclear Regulatory Commission ATTN.:
Document Control Desk Mail Station P1-137 Washington, D.C.
20555 Gentlemen:
ULNRC-3085 TAC NO. 67223 CALLAWAY PLANT DOCKET NUMBER 50-483 RESOLUTION OF GENERIC SAFETY ISSUE 93,
" STEAM _ BINDING OF AUXILIARY PEEDWATER PUMPS" Ref erences : 1) NRC Bulletin No. 85-01 dated October 29, 1985
- 2) NRC Generic Letter 88-03 dated February 17, 1988
- 3) NRC letter from T.
W.
Alexion to D.
F.
Schnell dated July 8, 1988
- 4) NRC Inepection Report No. 05-483/90013 (DRP) dated August 28, 1990 Generic Letter 88-03 was issued to alert licensees of the potential for steam binding in the auxiliary feedwater system.
Union Electric responded to this issue by letter dated May 12, 1988 (ULNRC-1774).
This letter stated that a combination of training, administrative controls, and design features would be utilized to minimize the possibility of steam binding the auxiliary feedwater
(. FW) pumps.
In addition, Union A
Electric elected to vent the AFW pumps each shift'to ensure that no system back-leakage had occurred.
This commitment exceeded the recommendations of Bulletin 85-01 and Generic Letter 88-03.
Venting the pumps each shift has resulted in rust stains and general housekeeping concerns in the area of the pumps.
A review of the AFW system piping i
arrangement shows that touching the pipe in the area of the pump discharge check valve (as recommended by Bulletin 85-01 and as required by Callaway procedures) provides adequate indication of the fluid conditions.
Therefore, Union Electric will no longer vent the AFW pumps each shift.
<n 9410210185 941031
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USNRC --3085 Page 2 Please contact us if you have any questions or comments concerning this commitment change.
Very truly yours, Pit Donald F.
Schnell I
WEK/kea i
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cc:
T.
A.
Baxter, Esq.
Shaw, Pittman, Potts & Trowbridge 2300 N.
- Street, N.W.
Washington, D.C.
20037 M.
H.
Fletcher Professional Nuclear Consulting, Inc.
18225-A Flower Hill Way Gaithersburg, MD 20879-5334 L.
Robert Greger Chief, Reactor Project Branch 1 U.S.
Nuclear Regulatory Commission Region III 801 Warrenville Road Lisle, IL 60532-4351 Bruce Bartlett Callaway Resident Office U.S.
Regulatory Commission RR#1 Steedman, MO 65077 L.
R.
Wharton (2)
Office of Nuclear Reactor Regulation U.S.
Nuclear Regulatory Commission 1 White Flint, North, Mail Stop 13E21 11555 Rockville Pike Rockville, MD 20852 Manager, Electric Department Missouri Public Service Commission P.O.
Box 360 Jefferson City, MO 65102