ML19210C139
| ML19210C139 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/30/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Arnold R METROPOLITAN EDISON CO. |
| References | |
| NUDOCS 7911130321 | |
| Download: ML19210C139 (4) | |
Text
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UNITED STATES E
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NUCLEAR REGULATORY COMMISSION
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i WASHINGTON, D. C. 20555 October 30, 1979 Docket No. 50-289.
Mr. R. C. Arnold Senior Vice President Metropolitan Edison Company 260 Cherry Hill Road Parsippany, New Jersey 07054 Dear Mr. Arnold; With respect to your investigation and proposed repair of the defective pipe welds in Three Mile Island, Unit 1, we have reviewed your submittals (Letters dated August 15,1979 GQL 1059 and September 5,1979 GQL 1141) and infomation obtained during the Three Mile Island (TMI) site visit on October 3,1979, to clarify some of the staff's ccncerns.
Your investigation shows that the defective pipe welds have been classifi&d Intergranular Stress Corrosion Cracks (IGSCC) in the heat affected zone of '
the welds. As a result of our reviewseffort, we request that you submit the following infonnation described in the enclosure in order that we may complete our evaluation of the screening and repair technique.
Part of.your submittal should include a surveillance program as requested in the enclosure.
You are requested from the date of this letter to submit this infomation in accordance with the following schedule.
A.
Items 1, 2 & 3 20 days B.
Items 4, 5 & S 60 days C.
Item 7 90 days Sincerely, lh.
Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors
Enclosure:
Request for Additional
}323
} $3 Infonnation cc: w/ enclosure See next page 7911.130
Metro olitan Edison Company
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ter D v Dak Ridge, Tennessee 37830 cc w/ enclosure (s).
Hr. Marvin I.. Lewis Dr. Linda W. Little 6504 Bradford Terrace 1
5000 Hermitage Drive Raleigh,, North Carolina 27612 P,h'.l a del phia, Pennsylvania 19149
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Walter W. Cohen, Conwner Advocate Holly S. Keck Department of Justice Anti-Nuclear Group Representing Strawberry Square,14th Floor York Harrisburg, Pennsylvania 17127 245 W. Philadelphia Street York, Pennsylvania 17404 Robert L. Kr..rpp Esq.
Assistant Solicitor John Levin, Esq.
Riupp and Andrews-Pernsylvania Public Utilities Com.
P.O. Box P Box 3265 407 N. Front Street Harrisburg, Pennsylvania 17120 Harrisburg, Pennsylvania 17108 Jordan D. Cunningham, Esq.
John' E. Minnich, Cha;rman Fox, Farr and Cunningham Dauphin -Co. Board of Comissioners 2320 North 2nd Street Dauphin County Courthouse Harrisburg, Pennsylvania 17110 Frunt and Marke; Sts.
Harr Isburg, Pennsylvania.17101 Theod'oreA.Adler,Esq.'
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WIDOFF REAGERJiELK0WITZ & ADLER
- Atomi-c Safety and Licensing Appeal Board Post Office Box 1547 U.S. Nuclear Regulatory Commission Harrisburg, Pennsylvania 17105 Washington, D. C.
20555 Ms. Marjorie M. Aamodt
- Atomic Safety and Licensing Board Paael i
R.D. f5 U.S. Nuclear Regulatory Commission Coatesville, Pennsylvania 19320 Washington, D. C.
20555 Ms. Karen Sheldon Sheldon, Harmon, Roisman & Weiss
- Docketing and Service Section
! 1725 I Street, H. W.
U.S. Nuclear Regulatory Commission Ssite 506 Washington, D. C.
20555 Washington, D. C.
20006 Robert Q. Pollard I ' Earl B. Hoffman Chesapeak Energy Alliance Dauphin County Comissioner
'609 Montpelier Street
, Dauphin County Courthouse Baltimore, Maryland 21218 Front and Market Streets Harrisburg, Pennsylvania 17101 Chauncey Kepford Judith H. Johnsrud Ellyn Weiss, Esq.
Environmental Coalition on Nuclear Power Sheldon Harmon, Roisman & Weiss he50 433 Orlando Avenue State College, Pennsylvania 16801 Washington, r.C.
20006
/
Ms. Frieda Berryhill, Chairman l
Mr. Steven C. Sholly Coalition for Nuclear Power Plant
'304 South Markat Street-Postponement 2610 Grendon Drive Mechanicsburg, Pennsylvania 17055 Wilmington, Delaware 19808 Mr. Thomar Gerusky Mrs. Rhoda D. Carr Bureau of Radiation Protection 1402 Marene Drive Department of Environmental. Resources P.O. Box 2063 Harrisburg, Pennsylvania 17109 Harrisburg, Pennsylvania 17120 1323 154
t Karin W. Carter, Esq.
505 Executive House P. O. Box 2357 Metropo!itan Edison Company Harrisburg, Pennsylvania 17120
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Honorable Mark Cohen 512 E-3 Main Capital Building cc w/en-losure(s):
G. F. Trowbridge, Esquire
' Dauphin County Office Energency Shaw, Pittman,.Potts & Trowbridge Preparedness 1800 M Street, N.W.
Court House, Room 7 Washington, D. C.
20036 Front & ttarket Streets Harrisburg, Pennsylvania l'7101 GPU Service Corporation Richard 11. Heward, Project !!anager Mr. E. G. Wallace Department of Environmental Resources Licensing Manager ATTN:
Directce, Office of Radiological 260 Cherry Hill Road Heal th Parsippany, New Jersey 07054 Post Office Sox 2063 Harrisburg, Pennsylvania 17105
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Pennsylvania Electric Company itr. R. W. Conrad Director, Technical Assessment Vice President, Generation Division 1001 Broad Street Office of Radiation Programs Johnstown, Pennsylvania 15907 (AW-459)
U. S. Environmental Protection Agency Miss ttary V. Southard, Chairman Crystal Mall #2
. Citizens for a Safe Environment Arlington, Virginia 20460 Post Office Box 405 Harrisburg, Pennsylvania 17108 Mr. Robert B. Borsum Babcock & Wilcox Government Publications Section Nuclear Power Generation Division State of Library of Pennsylvania Suite 420, 7735 Old Georgetown Road Box 1601 (Education Building)
Bethesda, Maryland 20014 Harrisburg, Pennsylvania 17126
- Ivan W. Smith, Esq.
j Dr. Edward O. Swartz Atomic Safety & Licensing Board Panel Board of Supervisors U.S. Nuclear Regulatory Commission Londonderry Township Washington, D. C.
20555 l
RFD#1 - Geyers Church Road tiiddletown, Pennsylvania 17057 U. S. Environmental Protection Agency Region III Office ATTN:
EIS C0ORDINATOR Governor's Office of State Planning Curtis Building (Sixth Floor) and Development 6th and Walnut Streets ATTf!:
Coordinator, Pennsylvania
. Philadelphia, Pennsylvania 19106 State Clearinghouse Mr. J. G. Herbein P. O. Box 1323 Vice President Harrisburg, Pennsylvania 17120 Metropolitan Edison Compary P. O. Box 480 Middletown, Pennsylvania 17057 323 155 Ms.. Jane Lee P..D.
3; Box 3521 Etters, Pennsylvania 17319
Enclosure REQUEST FOR ADDITIONAL INFORMATION ON 3.
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DEFECTIVE PIPE WELDS AT TMI-1 DOCKET NO. 50-289 l
' Furnish the repair procedures for pipes with 1GSCC including details of buttering techniques.
Include laboratory test results and metallo-graphy reports performed to support the use of such buttering techniques.
2.
Provide information regarding material selection, noting specified carbon limits, for replacement; pipe and filler metal.
3.
Provide locations of the 40 welds which were identified as containing rejectable reflectors from the UT evaluation.
Identify the welds that will be repaired. prior to restart, if restart is authorized, and those welds with indications to be left in the pip.ing and monitored to ascertain potential flaw growth rate.
4.
Provide the technical basis for UT procedures used for evaluation of the indications identified from the initial screening.
5.
Provide the pipe analysis of the piping systems for which cracks will not be removed based on the maximum allowable flaw size when seismic, mechanical, residual and thermal loads are applied.
6.
Provide the surveillance program for the susceptable Safety Related pipe systems with Type 304SS including the basis for sampling. As a minimum, the information should address the type a'nd frequency of inspection.
In addition, provide the acceptance criteria which ensures that sufficient margin exists. A basis should be included which demonstrates that the frequency, extent, and sensitivity of the planned inspection are adequate to detect flaw sizes established in the acceptance criteria.
7.
Provide the final report including the results of tests and evaluations by the licensee and contractors which aids in dcrining the cause of pipe cracking and support the efficacy of the corrective action taken.
1323 196
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