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-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

Event date:
Report date:
4231997011R00 - NRC Website

text

_.

___.___-,_.______,._m.

' 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, 1

NORTHEAST NUCLEAR ENERGY COMPANY C.

A G..#"

irector - Millstone Unit 3 f

\\

9706180301 970612 PDR ADOCK 05000423:

g S

PDR '

l]l$,

mams unus-es

U.S. Nucl:ar Regulatory Commission t

l B16525'Page 2 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 i

f l

s l

\\

l e

I

-. ~.

- _. -. - - -. - _ ~ _ _ - - -. -...

l l

ct l-I f

Docket No. 50-423 B16525 l

l i

i I

Millstone Nuclear Power Station Unit No. 3 Revised Commitments I

l i

l l

l June 1997 l

i l

4 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 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.

i f

i i