ML20147G860
| ML20147G860 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/26/1997 |
| From: | James Shea NRC (Affiliation Not Assigned) |
| To: | Hunger G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| TAC-M97833, NUDOCS 9703280336 | |
| Download: ML20147G860 (4) | |
Text
Mr. George A. Hunger. Jr.
M reh 26, 1997 Director-Licensing. MC 62A-1 PECO Energy Company i
Nuclear Group Headquarters Correspondence Control Desk P.O. Box No. 195 Wayne PA 19087-0195
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) RELATED TO PROPOSED ALTERNATIVE REACTOR PRESSURE VESSEL EXAMINATIONS. PEACH BOTTOM ATOMIC POWER STATION UNIT 3 (TAC NO. M97833)
Dear Mr. Hunger:
By letter dated January 30, 1997. PECO Energy Company (PECO) submitted a proposed alternative plan for augmented inspection of the Unit 3 reactor pressure vessel during refueling outage 3R11.
PECO requested NRC approval of the alternative plan by May 1. 1997.
The staff has initiated a review of the proposed alternative and determined that additional information is needed to complete the review.
The staff's RAI is included as an enclosure.
If you have any questions on this RAI. please do not hesitate to contact me at (301) 415-1428.
Sincerely.
/S/
Joseph W. Shea. Project Manager Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket Nos. 50-278
Enclosure:
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%,,,,, 8 March 26, 1997 Mr. George A. Hunger. Jr.
Director-Licensing. MC 62A-1 PECO Energy Company Nuclear Group Headquarters Correspondence Control Desk P.O. Box No. 195 Wayne. PA 19087-0195
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) RELATED TO PROPOSED ALTERNATIVE REACTOR PRESSURE VESSEL EXAMINATIONS. PEACH BOTTOM ATOMIC POWER STATION. UNIT 3 (TAC NO. M97833)
Dear Mr. Hunger:
By letter dated January 30, 1997. PECO Energy Company (PECO) submitted a proposed alternative plan for augmented inspection of the Unit 3 reactor pressure vessel during refueling outage 3R11.
PEC0 requested NRC approval of the alternative plan by May 1. 1997.
The staff has initiated a review of the proposed alternative and determined that additional information is needed to complete the review. The staff's RAI is included as an enclosure.
If you have any questions on this RAI. please do not hesitate to contact me at (301) 415-1428.
Si
- ely, Jo ph W. Shea Project Manager Fro'ect Directorate I-2 Division of Reactor P:ajects - I/II Office of Nuclear Reactor Regulation Docket Nos. 50-278
Enclosure:
RAI cc w/ encl: See next page
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'r Mr. George A. Hunger, Jr.
Peach Bottom Atomic Power Station,
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PECO Energy Company Units 2 and 3 i
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j J. W. Durham, Sr., Esquire Chief-Division of Nuclear Safety 4
Sr. V.P. & General Counsel PA Dept. of
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PECO Energy Company Environmental Resources 2301 Market Street, S26-1 P.O. Box 8469 Philadelphia, PA_ 19101 Harrisburg, PA 17105-8469 PECO Energy Company ATTN: Mr. T. N. Mitchell, Vice President Board of Supervisors Peach Bottom Atomic Power Station Peach Bottom Township 1848 Lay Road R. D. #1 Delta, PA 17314 Delta, PA 17314 PECO Energy Company Public Service Commission of Maryland ATTN:
Regulatory Engineer, A4-5S Engineering Division Peach Bottom Atomic Power Station Chief Engineer 1848 Lay Road 6 St. Paul' Centre
-Delta, PA 17314 Baltimore, MD 21202-6806 Resident Inspector Mr. Richard McLean U.S. Nuclear Regulatory Commission Power Plant and Environmental Peach Bottom Atomic Power Station Review Division P.O. Box 399 Department of Natural Resources Delta, PA 17314 B-3, Tawes State Office Building Regional Administrator, Region I U.S. Nuclear Regulatory Commission Dr. Judith Johnsrud 475 Allendale Road National Energy Committee King of Prussia, PA 19406 Sierra Club 433 Orlando Avenue Mr. Roland Fletcher State College, PA 16803 Department of Environment i
201 West Preston Street Manager-Business & Co-owner Affairs Baltimore, MD 21201 Public Service Electric and Gas Company A. F. Kirby, III P.O. Box 236 External Operations - Nuclear Hancocks Bridge, NJ 08038-0236 i
Delmarva Power & Light Company P.O. Box 231 Wilmington, DE 19899 Manager-Peach Bottom Licensing PECO Energy Company PECO Energy Company Nuclear Group Headquarters i
Plant Manager Correspondence Control Desk Peach Bottom Atomic Power Station P.O. Box No. 195 1848 Lay Road Wayne, PA 19087-0195 Delta, PA 17314-
1, REQUEST FOR ADDITIONAL INFORMATION PEACH BOTTOM ATOMIC POWER STATION. UNIT 3 REACTOR PRESSURE VESSEL PROPOSED ALTERNATIVE EXAMINATION PLAN 9
Title 10 of the Code o' Federal Reaulations, 50.55a(g)(6)(ii)(A)(2) states that ail licensees shall augment their reactor vessel examinations by implerrenting the examination requirements for reactor vessel shell welds i
specified in Item Bl.10 of Examination Category B-A, " Pressure Retaining Welds in Reactor Vessel." in Table IWB-2500-1 of subsection IWB of the 1989 Edition of ASME Code Section XI. However, PECO Energy Company stated that they were unable to achieve 90 percent volumetric examination coverage for each weld due to limitations of access.
l The staff has reviewed the licensee's submittal of the proposed alternatives to the augmented examination of the reactor vessel shell welds and requests the following additional information from the licensee to perform an evaluation:
Identify each weld in Item Bl.10 of Examination Category B-A with estimated volumetric examination coverage to be obtained by an Inner Diameter (ID) examination.
Discuss physical constraints inside the vessel, such as, removable internals, permanent attachments to vessel wall that obstruct scanning of the shell welds to obtain the required volumetric examination coverage.
Provide an estimate of increase in examination coverage of each weld when supplemented by an Outer Diameter examination. Also, discuss physical constraints, if any, that would obstruct manual and/or mechanized scanning of the above welds from the outside surface of the vessel to supplement the ID examination to obtain the required volumetric coverage.
Provide dimensions of the largest indication (planar and/or iinear) in each of the welds accepted during the preservice and the subsequent inservice inspection.
Enclosure l
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