ML20213E784

Forwards Safety Evaluation Granting Relief from Weld Exam Requirements for Peripheral CRD Housings (1974 ASME Section XI Requirements),Per 10CFR50.55(a) & Util 861002 Request. Exam Method Proposed on 861204 Acceptable

ML20213E784
Person / Time
Site:	Calvert Cliffs
Issue date:	05/11/1987
From:	Capra R Office of Nuclear Reactor Regulation
To:	Tiernan J BALTIMORE GAS & ELECTRIC CO.
Shared Package
ML20213E786	List: ML20213E784 ML20213E873
References
NUDOCS 8705150148
Download: ML20213E784 (4)

Text

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May 11, 1987 Docket Nos. 50-317 DISTRIBUTION TMarsh and 50-318 Docket File m; EJordan NRC PDR B. Boger L PDR JPartlow Mr. J. A. Tiernan . PCI-1 Rdg SVarga Vice President-Nuclear Energy FMiraglia CVogan Baltimore Gas & Electric Company OGC-Beth SMcNeil P. O. Box 1475 ACRS-10 LTripp (Lowell)

Baltimore, MD 21203

SUBJECT:

RELIEF FROM THE 1974 ASME CODE SECTION XI REQUIREMENTS FOR CLASS 1 AND 2 BOLTING AND CONTROL R0D DRIVE HOUSINGS r

I The Commission staff has completed their review of your request for ASME Code

! update and relief as provided in your submittal dated October 2,1986. This l 1

submittal requested that the Section XI requirements of the ASME Code be updated L

from the 1974 Edition to the 1977 Edition or later approved editions for Class 1 f and 2 bolting and for control rod drive housing:. These inservice inspections l were performed based upon the 1977 ASME Code reouirements during the Fall 1986 Unit I refueling outage.

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Your supplemental letter of December 4,1986, requested Commission approval of an alternative examination method for the control red drive housings from that described in IWB-2600,Section XI of the 1977 ASME Code as you had determined that these requirements were impractical to perform (as were the 1974 ASME Code requirements) for the control rod drive housings.

The 1977 ASME Code requires that 100% of the welds on 10% of the peripheral control rod drive housings be examined. This submittal stated that 100% of the welds could not be examined as these welds extended into the reactor vessel head itself. Instead, you proposed to perform an equivalent, alternative I examination by inspecting 75% of the welds on three control rod drive housings I and 50% of the welds on two control rod drive housings.

l In accordance with the provisions of 10 CFR 50.55a(g)(4)(iv), the staff l has determined that your requests for ASME Code update of the Section XI l requirements for Class 1 and 2 bolting and for the control rod drive housings is acceptable and this partial ASME Code update is hereby approved.

In addition, the staff has reviewed the requirements to examine 100% of the l welds on three peripheral control rod drive housings and has determined this requirement to be impractical due to the physical configuration of these I housings and the reactor vessel head itself. The Commission finds that the alternative examination method proposed in your December 4,1986 submittal is acceptable contingent upon your performance of 100% weld examinations on the peripheral control rod drive housings at times when this examination is physically feasible (e.g., if the control rod drive housing was physically removed from the reactor vessel head). This contingency shall be applicable to all future 10-year inservice inspection intervals for each unit.

8705150148 870511 PDR P

ADOCK 05000317 PDR

The Comission hereby grants this relief from the weld examination requirements for the peripheral control rod drive housings pursuant to 10 CFR 50.55a(g)(6)(1) and finds that this relief is authorized by law and will not endanger life or property or the comon defense and security and is otherwise in the public interest giving due consideration to the burden upon the lice.nsee that could result if the requirements were imposed on the facility.

Our Safety Evaluation is enclosed.

Sincerely,

/

Robert A. Capra, Acting Director Project Directorate I-1 Division of Reactor Projects, I/II

Enclosure:

Safety Evaluation cc w/ enclosure:

See next page I

• SEE PREVIOUS CONCURRENCE o PDI-1 PDI-I E 0 tr P I-1 CVogan* SMcNeil* CYCheng o RCapra 4/23/87 4/23/87 5/ b/87 5/g/87 5/11/87 i

2-The Connission hereby grants this relief from the weld examination requirements for the peripheral control rod drive housings pursuant to 10 CFR 50.55a(g)(6)(1) and finds that this relief is authorized by law and will not endanger life or property or the common defense and security and is otherwise in the public interest giving due consideration to the burden upon the licensee that could result if the requirements were imposed on the facility.

Our Safety Evaluacion is enclosed.

Sincerely, Robert A. Capra, Acting Director Project Directorate I-1 Division of Reactor Projects, I/II

Enclosure:

Safety Evaluction cc w/er. closure:

See next page PDI-1 h PDI-1 EMEB' EF178 OGC PDI-1 CVogan SMcNei M TMarshr CYchen; JScinto RCapra 4/g'h/87 4/a3/87 '4 / /87 g/ /87 g/ /87 y r r l

'% Mr. J. A. Tiernan

'*k Baltimore--Gas & Electric . Company Calvert Cliffs Nuclear Power Plant cc: -

Mr. William T. Bowen, President Regional Administrator, Region I Calvert County Board of U.S. Nuclear Regulatory Commission Commissioners Office of Executive Director Prince Frederick, Maryland 20768 for Operations 631 Park Avenue D. A. Brune, Esq. King of Prussia, Pennys1vania 19406 General Counsel Baltimore Gas and Electric Company P. O. Box 1475 Baltimore, Maryland 21203 Jay E. Silberg Shaw, Pittman, Potts and Trowbridge 2300 N Street, N.W.

Washington, DC 20037 Mr. M. E. Bowman, General Supervisor Technical Services Engineering Calvert Cliffs Nuclear Power Plant MD Rts 2 & 4, P. O. Box 1535 Lusby, Maryland 20657-0073 Resident Inspector c/o U.S. Nuclear Regulatory Commission P. O. Box 437 Lusby, Maryland 20657-0073 Bechtel Power Corporation ATTN: Mr. D. E. Stewart Calvert Cliffs Project Engineer 15740 Shady Grove Road Gaithersburg, Maryland 20760 Combustion Engineering, Inc.

ATTN: Mr. W. R. Horlacher, III Project Manager P. O. Box 500 1000 Prospect Hill Road Windsor, Connecticut 06095-0500 .

Department of Natural Resources Energy Administration, Power Plant Siting Program ATTN: Mr. T. Magette Tawes State Office Building Annapolis, Maryland 21204

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