05000423/LER-1997-011, Provides Revised Schedule for Completion of Corrective Actions Committed to in LER 97-011-00, H Recombiner Heaters Potentially Outside of Design Basis Under Degraded Voltage Conditions

Provides Revised Schedule for Completion of Corrective Actions Committed to in LER 97-011-00, H Recombiner Heaters Potentially Outside of Design Basis Under Degraded Voltage Conditions

ML20140H529
Person / Time
Site:	Millstone
Issue date:	06/12/1997
From:	Hicks G NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
B16525, NUDOCS 9706180301
Download: ML20140H529 (4)

LER-2097-011, Provides Revised Schedule for Completion of Corrective Actions Committed to in LER 97-011-00, H Recombiner Heaters Potentially Outside of Design Basis Under Degraded Voltage Conditions

Event date:
Report date:
4232097011R00 - NRC Website

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' g g.g Itape Ferry Iki (Route 1Ns), Waterford, CT 06385 Nuclear Energy nin, ion, soa,ar com siain n

, Nordwa.: Nuclear Energy Company

, P.O. Ilus 128

[ Waterford, CT 06335-0128 ,

(860) 447 1791 l Faa (860) 444 4277 The Nortlwant Utihtic Synem June 12,1997 I Docket No 50-423 -

B16525 i

U.S. Nuclear Regulatory Commission  !

Attention: Document Control Desk -

Washington, DC 20555 i Millstone Nuclear Power Station Unit No. 3 i Revised Schedule Ca'culation Of Hydroaen Recombiner Heater Performance j The purpose of this letter is to provide our revised schedule for the completion of {

corrective actions previously committed to in Licensee Event Report 97-011-00, i "Hydroaen Recombiner Heaters Potentially Outside Of Dosion Basis Under l Dearaded Voltaae Conditions". This extension is necessitated as a direct result i of providing the incorrect parameters to Boeing /Rocketdyne with which to perform the calculations committed to within our letter of February 28,1997.  !

The design parameters provided were based on the original sub-atmospheric j pressure containment design. These parameters changed as a result of an  ;

increase in containment operating pressure authorized under Amendment 59.  !

Our revised commitments are provided in Attachment 1. l Should you have any questions regarding this matter please contact Mr.

David A. Smith at (860) 437-5840.

Very truly yours, l 1

NORTHEAST NUCLEAR ENERGY COMPANY l G.

C.

A ,

irector - Millstone Unit 3 f

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9706180301 970612 PDR ADOCK 05000423: g S PDR '

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t , U.S. Nucl:ar Regulatory Commission l

B16525'Page 2 i i

ec ' H. J. Miller, Region i Administrator '

i- W.D. Travers, PhD, Director, Special Projects Office J. W. Andersen, NRC Project V,anager, Millstone Unit No. 3 A. C. Corne, Senior Resident inspector, Millstone Unit No. 3  ;

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l l ct l-I f Docket No. 50-423 B16525 l

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I Attachment 1 Millstone Nuclear Power Station Unit No. 3 Revised Commitments I

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June 1997 l l

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,- U.S. Nucl:cr Regulatory Commission B16525%ttachment 1\Page 1 Enclosure List of Regulatory Commitments The following table identifies those actions committed to by NNECO in this ,

document. Please notify the Manager - Nuclear Licensing at the Millstone l Nuclear Power Station Unit No. 3 of any r(asstions regarding this document or  :

any associated regulatory commitments.

Commitment Committed Date B16233-01 1 Perform a calculation or evaluation to August 13,1997 (LER 97-011-00) determine the Hydrogen Recombiner heater performance under degraded voltage conditions.

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