Part 21 Report - 1997-040
ACCESSION #: 9612060083
North Atlantic Energy Service Corporation
P.O. Box 300
Seabrook, NH 03874
The Northeast Utilities System
November 27, 1997
Docket No. 50-443
United States Nuclear Regulatory Commission
Attention Document Control Desk
Washington, D.C. 20555
Supplement to Diesel Generator Special Report
North Atlantic Energy Service Corporation (North Atlantic) has enclosed a
supplement to its October 17, 1996 1_/ Diesel Generator Special Report
which documented diesel generator failures experienced during the period
of September 19 through 22, 1996. The Special Report was filed in
accordance with Technical Specifications 22.214.171.124.3 and 6.8.2. This
supplement details North Atlantic's actions taken in regard to potential
10 CFR Part 21 issues identified by North Atlantic and associated with
the events described in the October 17, 1996 Special Report. This
supplement is submitted pursuant to 10 CFR 21.21(a)(2), as an interim
report regarding a potential 10 CFR 21 defect.
Should you have any questions regarding this response, please contact Mr.
Anthony M. Callendrello, Licensing Manager, at (603) 474-9521, extension
Very truly yours,
NORTH ATLANTIC ENERGY SERVICE CORP.
cc: H. J. Miller, Regional Administrator
A. W. De Agazio, Sr. Project Manager
J. B. Macdonald, NRC Senior Resident Inspector
Mr. Ted Stevenson
Fairbanks Morse Engine Div.
701 White Avenue
Beloit, WI 53511
1_/ North Atlantic letter NYN-96073, "Diesel Generator Special Report,"
W. A. DiProfio to Document Control Desk.
SUPPLEMENT TO DIESEL GENERATOR SPECIAL REPORT
Emergency Diesel Generator 1A
This Supplemental Diesel Generator Special Report documents North
Atlantic's actions pertaining to a potential 10 CFR 21 defect. This
supplement is submitted pursuant to 10 CFR 21.21(a)(2) as an interim
report on a potential 10 CFR 21 defect.
North Atlantic identified two specific items that required review to
determine 10 CFR 21 reportability. The two issues involve replacement
powerpills discussed in the initial October 17, 1996 Special Report and
the operation of the temperature control valve which use the powerpills
to control diesel generator lube oil temperature. Discussions with
Coltec Industries, the diesel generator manufacturer, resulted in a
decision to transfer responsibility for evaluating these issues to
Coltec. North Atlantic and Coltec agree that Coltec has the unique
experience and expertise necessary to conclusively determine if a 10 CFR
21 reportable condition exists.
Coltec requested that North Atlantic forward engine operating data, a
chronological sequence of events, the powerpills in question and test
results to Coltec to aid in their evaluation. Coltec plans on discussing
the powerpill issues with RobertShaw Manufacturing, the manufacturer of
the powerpills. Coltec will make any 10 CFR 21 required notifications to
the NRC as appropriate. North Atlantic formally acknowledged transfer of
responsibility for evaluating the following conditions with respect to 10
CFR 21 reportability requirements on November 21, 1996 in North Atlantic
letter CE 96-015:
1. The powerpills procured from Coltec Industries did not adequately
allow the lube oil temperature control valve to regulate lube oil
temperature within it's required operating band. Subsequent testing
of the powerpills revealed that they did not meet the minimum
acceptance criteria for stroke as defined by RobertShaw.
2. Should the powerpill not reach full extension, the lube oil control
valve will remain in the heat exchanger bypass position and
overheating could result.
Submittal of this supplemental report is intended to address 10 CFR 21
interim reporting requirements, per 10 CFR 21.21(a)v(2). North Atlantic
has requested and expects that Coltec will complete their evaluation and
make the appropriate report to the NRC within sixty (60) days of the date
of this letter.
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