ML20076E307
| ML20076E307 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 08/15/1991 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TAC-79971, ULNRC-2463, NUDOCS 9108190232 | |
| Download: ML20076E307 (2) | |
Text
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53 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station P1-137 Unshington, D.C.
20555 U LNRC-2 4 6 3 TAC No. -79971 Gentlemen:
CALLAWAY PLANT DOCKET NUMBER 50-483 REVISION TO TECHNICAL SPECIFICATION 3.4.6.2 REACTOR COOLANT SYSTEM PRESSURE ISOIATION VALVES
Reference:
ULNRC-2377 dated March 15, 1991 The referenced letter transmitted an application for amendment to Facility Operating License Number NPF-30 for the Callaway Plant.
This amendment application requested a revision to Technical Specification 3/4.4.6 and associated Bases to change the allowed leakage limit for reactor <oolant system pressure isolation valves.
As committed to in a phone call on August 8, 1991 with the Callaway Project Manager, the following information supplements the discussion provided in the amendment request.
Increasing allowed leakage limits from 1 gpm up to 5 gpm for the reactor coolant system pressure isolation valves will not challenge the pressure relief capacity of interfacing systems.
This amount of leakage is considered negligible when compared with the capacity of the pressure relief v ves.
The leakage allowance should be proportioned to valve size because the sealing surface circumference, or potential for leakage is so proportioned.
Leakage of 5 gpm would not cause or be indicative of imminent accelerated deterioration or potential valve failure.
If you have additional questions, please contact us.
Very truly yours, f)
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Dexter, Esq.
Shaw, Pittman, Potta & Trowbridge 2300 N.
- Street, l'. W.
Washington, D.C.
20037 Dr.
J.
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Cermak CFA, Inc.
18225-A Flower Hill Way Gaithersburg, MD 20079-5334 R.
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Knop Chief, Reactor Project Branch 1 U.S. Nuclear Regulatory Commiasion Region III 799 Rooseve]t Road Glen Ellyn, Illinois 60137 Bruce Bartlett Callaway Resident Office U.S.
Nuclear Regulatory Comminnion RRM1 Steedman, Minoouri 65077 M.
D.
I,ynch (2)
Of fice of 11uclear Reactor Regulation U.S.
Nuclear Regulatory Commission 1 White Flint, 11o r th, Mail Stop 13E21 11555 Rockville Pike Rockvilie, MD 20852 Manager, Electric Department Missouri Public Service Comminnion P.O.
Box 360 Jefferson C1ty, MO 65102 Ron Kucera Department of Natural Resourcen P.0, Box 176 Jefferson City, MO 65102
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