ML20210A608
| ML20210A608 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 11/05/1985 |
| From: | Gucwa L GEORGIA POWER CO. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| 2247N, NED-85-803, TAC-59304, NUDOCS 8511150071 | |
| Download: ML20210A608 (2) | |
Text
4 Georgia Power Compa9r 333 Predmont Avenue Atlanta, Georgia 30308 Telephcne 404 S266526 Ma; ling Addrest Post Otf;ce Box 4545 Atlanta, Georgia 30302 h
Georgia Power L T. Gucwa im soutnem (Acc m!em Manager Nuclear Eng;rw:er;ng andchef Nuclear Engreer 2247N November 5, 1985 Director of Nuclear Reactor Regulation Atte.ition: Mr. John F. Stolz, Chief Operating Reactors Branch No. 4 Divitrlon of Licensing U. S. Nuclear Regulatory Commission Washington, D. C. - 20555 NRC DOCKET 50-321 OPERATING LICENSE DPR-57 EDWIN I. HATCH NUCLEAR PLANT UNIT 1 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION - ISI RELIEF REQUEST Gentlemen:
By letter NED-85-508 dated July 18, 1985, Georgia Power Company (GPC) requested specific relief from certain of the ASME Section XI Code requirements.to support inservice inspection activities during the upcoming Hatch Unit 1 (HNP-1) maintenance / refueling outage.
During the review of Relief Request 2.1.9 in Attachment 1 of the aforementfor.ed letter, Mr.
Birney Trouvlin of the NRC staff inquired about the makeup capacity of-the Control Rod Drive (CRD), Feedwater, and 'leactor Core Isolation Cooling (RCIC) systems and the maximum leakage rate for a CRD housing.
During a telephone conversation with Mr. Trouvlin on October 18, 1985, Mr. J. A. Edwards of GPC provided him with tne following information to support granting relief relative to pressure retaining welds in CRD housings:
CRD makeup flowrate:
160 gal / min.
(
Reference:
General Electric specification 22A2750AF, Rev. 0)
Transfer (Feedwater) 1000 gal / min. (
Reference:
General Electric flowrate:
specification 22A2750AF, Rev. 0)
RCIC makeup flowrate:
400 gal / min.
(
References:
HNP-1 FSAR Table 4.7-1 and General Electric specification 22A2750AF,Rev.0)
CRD housing maximum 840 gal / min. (
Reference:
HNP-1 FSAR Section 3.4) leakage rate:
0f 8511150071 851105 PDR ADOCK 050 1
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GeorgiaPowerd
- Director of-Nuclear Reactor Regulation Attention: Mr. John F. Stolz, Chief Operating Reactors Branch No. 4 November 5, 1985 Page Two
[ Note: While not identified to Mr. Trouvlin, the above CRD housing leakage rate would be applicable for all drive flange bolts failing in tension or the weld joining the flange to housing failing in tension, (refer to FSAR sections 3.4.6.4.3 and-3.4.6.4.4, respectively)].
Should you have any questions in this regard or require additional information concerning our relief requests, please contact this office.
Sincerely yours, fr g-m L. T. Gucwa JAE/mb
-xc:
Mr. J. T. Beckham, Jr.
Mr. H. C. Nix, Jr.
Dr. J. N. Grace (NRC-Region II)
Senior Resident Inspector rwm