ML20079P170

Forwards Structural Analysis of Pilgrim Vessel Head Drop, Shroud Head Assembly Drop & Steam Dryer Assembly Drop Conditions. Rept Redefining Project Scope of NUREG-0612 Experience Expected by 830715

ML20079P170
Person / Time
Site:	Pilgrim
Issue date:	02/28/1983
From:	Harrington W BOSTON EDISON CO.
To:	Eisenhut D Office of Nuclear Reactor Regulation
Shared Package
ML20079P172	List: ML20079P170 ML20079P200
References
REF-GTECI-A-36, REF-GTECI-SF, RTR-NUREG-0612, RTR-NUREG-612, TASK-A-36, TASK-OR 83-59, NUDOCS 8303040547
Download: ML20079P170 (2)

Text

-

'e.,,. .. J d, EOSTON EDISON COMPANY 500 BovLeTON STREET SOsTON. MAssACNUsETTs 02199 U.'. '.'.^.5.h.".^.""U "' " February - 28,1983

- " * - BECo Letter No. 83-59 I

Mr. Darrell G. Eisenhut, Director {

. Division of Licensing

0ffice of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

, License No. DPR-35 Docket No. 50-293

Subject:

Control of Heavy Loads

References:

A) NUREG 0612 " Control of Heavy Loads at Nuclear Power Plants,"

July , 1980.

B) NRC Letter, " Control of Heavy Loads, December 22, 1980.

Dear Sir:

Boston Edison has, in the past, made a number of submittals concerning the issues contained in References A and B. The draft Technical Evaluation Report supplied by the NRC to us, and subsequent conversations with the NRC Project Manager (NRR) for Pilgrim Station have demonstrated the need to expand the scope of our effort to satisfactorily address your concerns.

The planning of this effort has indicated that it would not substantially impact our response to not only move forward with this effort, but to carefully review our past work. We are confident that our past efforts to implement interim actions, and to address technical and procedural concerns have been consistent with our interpretation of NUREG 0612. However, to ensure the correctness of that interpretation,' and to provide an effective, comprehensive conclusion to all elements of NUREG 0612, Boston Edison has redefined the project scope and has retained an engineering consulting firm with extensive NUREG 0612 experience.

A schedule based on our new scope indicates that we shall submit a report by July 15, 1983. This report shall address the issues required for the six month and nine month reports.

Accompanying this letter is an attachment which is a plant specific analysis for Pilgrim Station. It deals with postulated vessel head drops, shroud head assembly drops, and steam dryer assembly drops onto/into the reactor vessel by the reactor building crane. This report concludes that such postulated events would not re-sult in criticality, loss of reactor coolant, nor a release of radioactivity.

WO O

803TDA EDI ON COMPANY Mr. Darrell G.'Eisenhut, Director February 28, 1983 Page 2 We believe this submittal is responsive to your needs. Should you require further information after reviewing it, please contact us.

Very truly yours, Y

2'h ?w'$

Attachment:

Structural Analysis of Pilgrim / Boston Edison Company Vessel Head Drop, Shroud Head Assembly Drop, and Steam Dryer Assembly Drop.

I

_ _ _ _ - _ _ _w