ML20012D345
| ML20012D345 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 03/15/1990 |
| From: | Kane W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Frizzle C Maine Yankee |
| Shared Package | |
| ML20012D346 | List: |
| References | |
| NUDOCS 9003270214 | |
| Download: ML20012D345 (2) | |
See also: IR 05000309/1990080
Text
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MAR 151990
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Docket No.- 50-309
Maihe Yankee Atomic' Power Company
= ATTN:
Mr. Charles D.
Frizzle, President
83 Edison Drive
Augusta, Maine
04336
Gentlemen:
Subject:
NRC SAFETY SYSTEM FUNCTIONAL INSPECTION FOLLOW-UP TEAM
REPORT NO. 50-309/90-80
This letter forwards the report of a Safety System Functional
Inspection (SSFI) Follow-up performed by an NRC Team from January-
14 through January 19, 1990, at Maine Yankee Station. The Team's
findings and preliminary conclusions were summarized for you and
members of your staff at a meeting held on site on January 19,
1990.
We found that you have invested considerable effort in addressing
individual SSFI Team findings.
This work includes calculational
revisions, component testing to confirm equipment performance,
procedural revisions and drawing changes, and additional training
-of plant staff as needed.
Extensive programs to resolve several
programmatic concerns have been developed and were observed to be
underway. Except for scheduled heat exchanger performance testing,
the design capability of the Component Cooling Water system has
been satisfactorily verified.
We recommend that you continue your evaluation of revised data for
the critical electrical protection issues involving large AC motor
overload protection,
fault protection for the DC buses,
short
circuit analyses for 4160-volt switchgear, and the effects of
multiple diesel generator starts on motor control center load
protection.
Your schedule for completion by the end of the 1991
refueling outage is of some concern to us, since we believe at
least partial corrective actions are possible prior to startup from
the April 1990 refueling outage, particularly regarding operability
concerns for the diesel generators.
Accordingly, we request that you respond in writing within 30 days
with justification for the above electrical issues being resolved
in approximately two years time, and the assurance which you have
that no operability concerns exist in the interim.
Also, your
proposal to administratively allow cross-tie of the DC buses for
up to seven days is, in our estimation, excessive and your safety
basis for this proposal should be addressed in your response.
9003270214 900313
ADOCK 05000309
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Maine Yankee' Atomic-PoNer Company
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- We encourage:you towards-upgrading instrument setpoint bases and
' documentation.
We also understand your setpoint open item resolu-
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tion process incorporates a review of input and assumptions for
both
original' and
newly
formulated
calculations,
and
should
identify- any
safety
concerns
in
order
to
take
appropriate
corrective actions as necessary.
Sincerely,
William F.
Kane, Director
Division of Reactor Projects
Enclosure: As stated
cc w/ encl.
J. Randazza, Assistant Chairman of the Board
J.
Garrity, Vice President, Engineering and Licensing
Dr.
E. Boulette, Vice President, Operations / Plant Manager
P. Anderson, Project Manager
G. Whittier, Manager, Nuclear Engineering and Licensing
J. Ritsher, Attorney (Ropes and Gray)
J.
Firth, Vice President, Public and Governmental Affairs
P. Ahrens,-Esquire
Public Document Room (PDR)
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Local Public Document Room (LPDR)
Nuclear Safety Information Center (NSIC)
NRC Resident Inspector
State of Maine
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bec w/ encl:
Region I Docket Room (with concurrences)
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Management Assistant, DRMA (w/o encl)
W.
Kane, DRP
J. Wiggins, DRP
J. Johnson, DRP
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E. McCabe, DRP
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Team Members and Their Supervisors
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J.
Dyer, EDO
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Boger, NRR
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J. Mauch, NRR
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