ML20126J192
| ML20126J192 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/05/1985 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Bauer E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| GL-84-11, NUDOCS 8506180551 | |
| Download: ML20126J192 (4) | |
Text
DMb/b Dockets Nos. 50-277 DJSTENIEN
/_Dack_et File )
JPartlow NRC PDR ACRS-10 L PDR RIngram Mr. Edward G. Bauer, Jr.
ORB #4 Rdg GGears Vice President and General Counsel HThompson Gray File Philadelphia Electric Company OELD EJordan 2301 Market Street BGrimes Philadelphia, Pennsylvania 19101
Dear Mr. Bauer:
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNIT 2, PIPE REPLACEMENT PROGRAM On November 30, 1983, the Commission authorized restart of the Peach Bottom Atomic Power Station, Unit 2, based upon certain Philadelphia Electric Company (the licensee) commitments and the approval of Unit 2 recirculation pipe repair activities as well as other corrective actions involving the recirculation piping system. An Order was issued on November 30, 1983, to confirm the licensee's commitments. After restart and full power operation, Unit 2 was removed from service on April 28, 1984 in order to start a refueling and major pipe replacement outage. As required in the above referer.ced Order, plans for the Unit 2 pipe replacement activities were transmitted to the NRC on March 6, 1984. On April 5,1984, a meeting between the licensee and the NRC was held at the NRC Region 1 offices to more fully discuss the licensee's proposed pipe replacement and refueling outage for Unit 2.
The Unit 2 extended outage is currently nearing completion with restart scheduled for early June.
In further compliance with the requirements of the above cited Orders, the licensee transmitted by letter dated April 15, 1985 a report justifying restart and continued operation for NRC review and approval. At our request, the licensee also submitted additional information on May 14, 1985 regarding the disposition of nonconforming welds that were not replaced during the current Unit 2 outage. This additional information was sought by the staff in its efforts to complete the Unit 2 Generic Letter 84-11 (" Inspections of BWR Stainless Steel Piping", April 19,1984) review.
We have reviewed the above information and have concluded that Peach Bottom Unit 2 can be safely returned to full power operation. Our conclusion is based on the following considerations:
(1) Except for seven welds, the licensee has replaced all the nonconforming piping in the recirculation, residual heat removal (RHR), RHR head spray, reactor water cleanup and core spray systems in Peach Bottom Unit 2.
The piping replacement also includes two jet pump instrument nozzles and ten recirculation inlet nozzle safe-ends and associated thermal sleeves, which were found to be cracked during this outage. The replacement piping material is low carbon ( 0.02%) Type 316 stainless steel which is considered to be resistant to intergranular stress corrosioncracking(IGSCC).
8506180551 850605 PDR ADOCK 05000277 P
Mr. Bauer, Jr. (2) The piping replacement was carried out in accordance with the provisions in 10 CFR 50.59 and the guidelines in Generic Letter 84-07 (" Procedure Guidance for Pipe Replacement at BWRS," March 14,1984). NRC Region I has closely monitored the piping replacecent activities including reviewing the procedures used in piping installation, welding and pre-service inspection, and is satisfied with all the piping replacement activities.
(3) Of the seven nonconforming welds that are not replaced, three welds are in the residual heat removal system, two welds are in the RHR head spray system and t*<o welds are in the core spray system. The operating temperature of all these welds is below 200 degrees Fahrenheit, there is no flow in these welds during normal operation and each weld can be isolated. Based on the above, we have determined that with the completion of the piping replacement Peach Bottom Unit 2 will not have any welds that require augmented inspection in accordance with Generic Letter 84-11.
It should, however, be pointed out that the licensee has indicated that, except for weld 10-HS-6 in the core spray system, all above cited nonconforming welds have been inspected during this outage and no crack indications were reported.
Based upon the above, we conclude that the licensee has satisfactorily completed the actions required by the Order and has complied with G. L.
84-11, including the incorporation of reactor coolant system leak detection and leakage limits (Amendment No. 105). Therefore, the Peach Bottom Atomic Power Station, Unit 2, may be returned to full power operation.
Sincerely,
'CEIGIFiC. S ic4C 3r JatiJ. mcca John F. Stolz, Chief Operating Reactors Branch f4 Division of Licensing cc: See next page
- See previous white for concurrences:
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Mr. Bauer, Jr..
(2) The piping replacement was carried out in accordance with the provisions in 10 CFR 50.59 and the guidelines in Generic Letter 84-07 (" Procedure Guidance for Pipe Replacement at BWRS," March 14,1984). NRC Region 1 has closely monitored the piping replacement activities including reviewing the procedures used in piping installation, welding and pre-service inspection, and is satisfied with all the piping replacement i
activities.
(3) Of the seven nonconforming welds that are not replaced, three welds are in the residual heat removal system, two welds are in the RHR head spray system and two welds are in the core spray system. The operating temperature of all these welds is below 200 degrees Fahrenheit, there is no flow in these welds during normal operation and each weld can be isolated. Based on the above, we have determined that with the completion of the piping replacement Peach Bottom Unit 2 will not have any welds that require augmented inspection in accordance with Generic Letter 84-11.
It should, however, be pointed out that the licensee has indicated that, except for weld 10-HS-6 in the core spray system, all above cited nonconforming welds have been inspected during this outage and no crack indications were reported.
Based upon the above, we conclude that the licensee has satisfactorily completed the actions required by the Order and has complied with G. L.
84-11, including the incorporation of reactor coolant system leak detection and leakage limits (Amendment No. 105). Therefore, the Peach Bottom Atomic Power Station, Unit 2, may be returned to full power operation.
Sincerely, John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing cc: See next page 9\\ N s
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Mr. E. G. Bauer, Jr.
Peach Bottom Atomic Power Station Philadelphia Electric Company Units 2 and 3 cc:
Eugene J. Bradley Mr. R. A. Heiss, Coordinator Philadelphia Electric Company Pennsylvania State Clearing Assistant General Counsel Governor's Office of State Planning 2301 Market Street and Development Philadelphia, Pennsylvania 19101 P.O. Box 1323 Harrisburg, Pennsylvania 17120 Troy B. Conner, Jr., Esq.
1747 Pennsylvania Avenue, N.W.
Thomas M. Gerusky, Director Washington, D.C.
20006 Bureau of Radiation Protection Pennsylvania Department of Thomas A. Deming, Esq.
Environmental Resources Assistant Attorney General P.O. Box 2063 Department of Natural Resources Harrisburg, Pennsylvania 17120 Annapolis, Maryland 21401 Philadelphia Electric Company Albert R. Steel, Chairman ATTN: Mr. R. Fleishmann Board of Supervisors Peach Bottom Atomic Peach Bottom Township Power Station R. D. #1 Delta, Pennsylvania 17314 Delta, Pennsylvania 17314
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Mr. M. J. Cooney, Superintendent General Division - Nuclear Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvani.a. 19101 Mr. Anthony J. Pietrofitta, General Manager Power Production Engineering Atlantic Electric P. O. Box 1500 1199 Black Horse Pike Pleasantville, New Jersey 08232 Thomas Johnson U.S. Nuclear Regulatory Comission Peach Bottom Atomic Power Station P.O. Box 399 Delta, Pennsylvania 17314 Mr. Thomas E. Murley, Regional Administrator U.S. Nuclear Regulatory Commission, Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 1