ML15223A537
| ML15223A537 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 10/22/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 7910310425 | |
| Download: ML15223A537 (11) | |
Text
OCTOBER 2 2 179 Distribution:
DpQ"ket files (3)
Attorney, OELD NRC PDR (3)
OI&E (3)
Dockets Nos. 50-2Qa9 L PDR R. Reid 50-270 ORB#4 Rdg.
M. Fairtile and 50-287 NRR Rdg.
R. Ingram D. Eisenhut J. R.-Buchanan Mr. William 0. Parker, Jr.
B. Grimes TERA Vice President - Steam Production R. Vollmer ACRS (16)
Duke Power Company T. J. Carter V. Noonan P. 0. Box 2178 W. Russell B. D. Laiw 422 South Church Street W. Gammill J. Strosnider Charlotte, North Carolina 28242 L. Shao Gray file J. R. Miller
Dear Mr. Parker:
The NRC was notified on July 24, 1979, of a tube leak in steam generator lB in Oconee Unit No. 1. The leak rate exceeded the Technical Specification0 limit of 0.3 gpm resulting in a shutdown of the Unit for inspection and repair. The tube was identified as73-130 at the periphery of the tube bundle and the leak wasilocated at the 14th support plate.
Subsequent work by your staff failed to determine the cause of the leak.
We understand you considered removing the tube but found this procedure very difficult because of the tube location. Fiber optic examination of the tube was unsuccessful. Your inspection of 230 tubes during the shut down did not reveal any significant growth of known flaws, indicate any tubes neighboring 73-130 with defects, nobwere new defects found in tubes previously inspected. We were informed by your staff that SG lB would be inspected again during the forthcoming Cycle 6 riload. Kindly submit the criteria for this proposed inspection program for our review. As neither DPC nor the NRC can offer a cause for the leak in the tube 73-130, we further request that you submit any programs you have on-going or planned for investigating the "erosion/corrosion" phenomenon previously found in SG lB and the results of any such investigationssto assist us in our assessment of this leak. In addition, we feel that a meeting between Duke Power and their consultants and the NRC to discuss the "erosion/
corrosion" phenomenon and the general condition of the Oconee Unit 1 steam generators may be appropriate prior to startup f810wing the upcoming inspection.
~0R~~DO~EB:DOR OFFICE 0R91
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FAIRTILE:kb NNA 1,.l013/79 10ONA l/Y./49 10// /79__
NRC FORM 318 19-76) NRCM 02-0 U.S. GOVERNMENT PRINTING OFFICE: 1979-289-369
Mr. William 0. Parker, Jr.
-2 Kindly provide the information at least two weeks before Unit 1 is shutdown.
Submit three signed originals and 37 additional copies of the transmittal letter.
Sincerely, Original signed by Robert W, Reid Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors cc: See next page O F F IC E S U R N A M E D A T E I.
NRC FORM 31S (9-761 NRCN: 3r DQiNTna nPmInE-1979289-369
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 October 22, 1979 Dockets Nos. 50-2591 50-270, and 50-287 Mr. William 0. Parker, Jr.
Vice President -
Steam Production Duke Power Company P. 0. Box 2178 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Parker:
The NRC was notified on July 24, 1979, of a tube leak in steam generator lB in Oconee Unit No. 1. The leak rate exceeded the Technical Specification limit of 0.3 gpm resulting in a shutdown of the Unit for inspection and reoair. The tube was identified as73-130 at the periphery of the tube bundle and the leak was located at the 14th support plate.
Subsequent work by your staff failed to determine the cause of the leak.
We understand you considered removing the tube but found this procedure very difficult because of the tube location. Fiber optic examination of the tube was unsuccessful.
Your inspection of 230 tubes during the shut down did not reveal any significant growth of known flaws, indicate any tubes neighboring 73-130 with defects, nor were new defects found in tubes previously inspected.
We were informed by your staff that SG lB would be inspected again during the forthcoming Cycle 6 reload.
Kindly submit the criteria for this proposed inspection program for our review. As neither DPC nor the NRC can offer a cause for the leak in the tube 73-130, we further request that you submit any programs you have on-going or planned for investigating the "erosion/corrosion" phenomenon previously found in SG 1B and the results of any such investigations to assist us in our assessment of this leak. In addition, we feel that a meeting between Duke Power and their consultants and the NRC to discuss the "erosion/
corrosion" phenomenon and the general condition of the Oconee Unit 1 steam generators may be appropriate prior to startup following the upcoming inspection.
Mr. William 0. Parker, Jr.
October 22, 1979 Kindly provide the information at least two weeks before Unit 1 is shutdown.
Submit three signed originals and 37 additional copies of the transmittal letter.
Sincerely, Robert W. Reid., Chief Operating Reactors Branch #4 Division of Operating Reactors cc:
See next page
Duke Power Company cc:
SWiliam L. Porter Duke Power Company Post Office Box 2178 "22 South Church Street Charlotte, North Carolina 25242 J. Michael McGarry, II Esquire DeBevoise & Liberman 700 Shoreham Building 806 15th Street, N.W.
Washington, D. C.
20005 U.
S.
Nuclear Regulatory Commission Reg ion II Office of Inspection and Enforcement ATTN:
Mr.
Francis Jape P. 0. Box 85 Seneca, South..Caroli.na 20678 ir.
Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearw*.ater, Florida 33515 Oconee Public Library 201 South Spring Street Walhalla, South Carolina 29691
01 F
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, 0. C. 20555 October 22, 1979 Dockets Nos. 50-269, 50-27 and 50-287 Mr. William 0. Parker, Jr.
Vice President -
Steam Production Duke Power Company P. 0. Box 2178 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Parker:
The NRC was notified on July 24, 1979, of a tube leak in steam generator lB in Oconee Unit No. 1. The leak rate exceeded the Technical Specification limit of 0.3 gpm resulting in a shutdown of the Unit for inspection and repair. The tube was identified as73-130 at the periphery of the tube bundle and the leak was located at the 14th support plate.
Subsequent work by your staff failed to determine the cause of the leak.
We understand you considered removing the tube but found this procedure very difficult because of the tube location. Fiber optic examination of the tube was unsuccessful.
Your inspection of 230 tubes during the shut down did not reveal any significant growth of known flaws, indicate any tubes neighboring 73-130 with defects, nor were new defects found in tubes previously inspected. We were informed by your staff that SG 1B would be inspected again during the forthcoming Cycle.6 reload.
Kindly submit the criteria for this proposed inspection program for our review. As neither DPC nor the NRC can offer a cause for the leak in the tube 73-130, we further request that you submit any programs you have on-going or planned for investigating the "erosion/corrosion" phenomenon previously found in SG 1B and the results of any such investigations to assist us in our assessment of this leak. In addition, we feel that a meeting between Duke Power and their consultants and the NRC to discuss the "erosion/
corrosion" phenomenon and the general condition of the Oconee Unit 1 steam generators may be appropriate prior to startup following the upcoming inspection.
Mr. William 0. Parker, Jr.
October 22, 1979 Kindly provide the information at least two weeks before Unit 1 is shutdown.
Submit three signed originals and 37 additional copies of the transmittal letter.
Sincerely, Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors cc:
See next page
Duke Power Company cc:
William L. Porter Duke Power CompanV Post Office Box 2178
,22 South Church Street Charlotte, North Carolina 2S242 J. Michael cGarry, III, Esquire DeBevoise & Liberman 700 Shoreham Building 806 15th Street, N.W.
.Washington, D. C.
20005 U. S. Nuclear Regulatory Commission Recion II Office of Inspection and Enforcement ATTN:
Mr. Francis Jape P. 0. Box 85 Seneca, South..Carolina 29678 Mr.
Robert B. Borsum Babcock & Wilcox Nuclear Rower Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Manager, LIS NUS Corporation 2536 countryside Boulevard Clearwater, Florida 33515 Oconee Public Library 201 South Spring Street Walhalla, South Carolina 29691
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, 0. C. 20555 October 22, 1979 Dock ets. Nos.
50-269, 50-270, and 50-2L87/
Mr. William 0.
Parker, Jr.
Vice President -
Steam Production Duke Power Company P. 0.
Box 2178 422 South Church Street Charlotte, North Carolina.28242
Dear Mr. Parker:
The NRC was notified on July 24, 1979, of a tube leak in steam generator 1B in Oconee Unit No. 1. The leak rate exceeded the Technical Specification limit of 0.3 apm resulting in a shutdown of the Unit for inspection and repair. The tube was identified as73-130 at the periphery of the tube bundle and the leak was located at the 14th support plate.
Subsequent work by your staff failed to determine the cause of the leak.
We understand you considered removing the tube but found this procedure very difficult because of the tube-location.
Fiber optic examination of the tube was unsuccessful.
Your inspection of 230 tubes during the shut down did not reveal any significant growth of known flaws, indicate any tubes neighboring 73-130 with defects, nor were new defects found in tubes previously inspected. We were informed by your staff that SG 1B would be inspected again during the forthcoming Cycle 6 reload.
Kindly submit the criteria for this proposed inspection program for our review. As neither DPC nor the NRC can offer a cause for the leak in the tube 73-130, we further request that you submit any programs you have on-going or planned for investigating the "erosion/corrosion" phenomenon previously found in SG lB and the results of any such investigations to assist us in our assessment of this leak.
In addition, we feel that a meeting between Duke Power and their consultants and the NRC to discuss the "erosion/
corrosion" phenomenon and the general condition of the Oconee Unit 1 steam generators may be appropriate prior to startup following the upcoming inspection.
Mr. William 0. Parker, Jr.
October 22, 1979 Kindly provide the information at least two weeks before Unit 1 is shutdown.
Submit three signed originals and 37 additional copies of the transmittal letter.
Sincerely, L
Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors cc:
See next page
Duke Power Company cc:
1r.
William L. Porter uke Power ComoanV Post Office Box 2178 422 South Church Street Charl otte, North Carol ina 25242 J.
Michael. McGarry, II, Esquire DeBevoise & Liberman 700 Shoreham suilding 806 15th Street, N.W.
Washincton, D. C.
20005 U. S. Nuclear Regulatory Commission Region II Office of Inspection and Enforcement ATTN:
Mr. Francis Jape P. 0. Box 85 Seneca, South.Carolina 29678
-ir. Robert B. Borsum Babcock & Wilcox Nuclear Rower Generation Division Suite 420, 7735 01d Georgetown Road Bethesda, Maryland 20014 Manaaer, LIS NUS Corporation 2536 Countryside Boulevard Clmarwater, Florida 33515 Oconee Public Library 201 South Spring Street Walhalla, South Carolina 29691