ML17056B792
| ML17056B792 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 04/10/1992 |
| From: | Hodges M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Endries J NIAGARA MOHAWK POWER CORP. |
| Shared Package | |
| ML17056B793 | List: |
| References | |
| NUDOCS 9204200052 | |
| Download: ML17056B792 (6) | |
See also: IR 05000410/1992081
Text
~
gyes
REGI
c+
P0
4y
lu
O
C
1
I
o
IVl
~O
4y*~+
UNITED STATES
NUCLEAR REGULATORY COMMISSION
REGION I
475 ALLENDALEROAD
KING OF PRUSSIA, PENNSYLVANIA19406.1415
APR 10 SR
'Dan
6hnI((no~
Docket No.
50-410
License No. NPF-69
Niagara Mohawk Power Corporation
ATTN:
Mr. John Endries
President
300 Erie Boulevard West
Syracuse, New York 13212
Dear Mr. Endries:
Subject:
-
NRC Region I Augmented Inspection Team (AIT) Review of the
March 23, 1992, Nine Mile Point Unit 2 Loss of Offsite Power and Control
Room Annunciator
This letter transmits the AITreport for the inspection led by Mr. J. E. Beall between
March 23-28,*1992.
This inspection assessed
the circumstances,
causes,
personnel actions,
and the safety implications of the loss of offsite power and control room annunciators.
At
the con'elusion of this inspection, a public exit meeting was held on April 1, 1992, with you
and other members of your organization to discuss the preliminary findings of the AIT.
The areas examined during the inspection included matters important to protect the health
and safety of the public.
These areas are identified in the enclosed inspection report..
Within these areas,
the AIT conducted detailed examinations of the'breakers,
relays and
power supplies involved in the event and related indications in the control room; held
discussions
and formal interviews with personnel involved in this event; reviewed relevant
records including computer printouts before, during, and after the event, and trends of
pertinent plant parameters;
and evaluated the adequacy of established
procedures,
management
oversight, and personnel training.
The AITconcluded that the event was, initiated by an inadvertent technician performance
error caused,
in part, by human factors problems.
The event demonstrated
the vulnerability
'fthe current Nine Mile Point Unit 2 design to a loss of control room annunciators during
shutdown or transient conditions.
This vulnerability was increased by delays in correcting a
problem previously identified by your staff with one of the power supplies to the control
room annunciators.
Operator performance was acceptable but the AITidentified weaknesses
in management
support that hampered
the operators in responding to the loss of offsite power.
(o~
9204200052
920410
ADOCK 05000410
8
, ~
Niagara Mohawk Power Corporation
2
The trip of the Division IIIemeigency diesel generator demonstrated
a problem in a'ssuring
cooling water to the machine following a sequential, rather than instantaneous,
loss of offsite
power.
Mr. McCormack stated at the exit meeting that this problem would be addressed
prior to Unit 2 startup.
Also at the exit meeting, Mr. McCormack described
a number of
corrective actions in the areas of work control, personnel performance and equipment
reliability. I request that you respond to this letter within 30 days of your receipt of this
'eport.
Your response
should discuss your plan for corrective actions.
In accordance with 10 CFR 2.790 of the NRC's "Rules of Practice," a copy of this letter and
the enclosure willbe placed in the NRC Public Document Room.
, We acknowledge and appreciate your excellent cooperation with our AITduring this period.
Sincerely,
Marvin W. Hodges, Director
Division of Reactor Safety
Enclosure:
NRC Region I Inspection Report 50-410/92-81
cc w/encl:
'. Sylvia, Executive Vice President - Nuclear
J. Firlit, Vice President - Nuclear Generation
C. Terry, Vice President - Nuclear Engineering
J. Perry, Vice President - Quality Assurance
S. Wilczek, Jr., Vice President - Nuclear Support
K. Dahlberg, Unit 1 Plant Manager
M. McCormick, Unit 2 Plant Manager
D. Greene, Manager, Licensing
J. Warden, New York Consumer Protection Branch
G. Wilson, Senior Attorney
Director, Power Division, Department of Public Service, State of New York
C. Donaldson, Esquire, Assistant Attorney General, New York Department of Law
K. Abraham, PAO (2)
Public Document Room (PDR)
Local Public Document Room (LPDR)
Nuclear Safety Information Center (NSIC)
NRC Resident Inspector
State of New York, SLO Designee
P. Eddy, State of New York
Niagara Mohawk Power Corporation
bcc w/encl:
Region I Docket Room (with concurrences)
Management Assistant, DRMA (w/o encl)
J.- Taylor, OEDO
E. Jordan, AEOD
T. Martin, RA
W. Kane, DRA
W. Lanrung, DRS
J. Fouchard, GPA
D. Rathburn, GPA
T. Murley, NRR
J. Calvo, NRR
S. Varga, NRR
C. Rossi, NRR
C. Cowgill, DRP
J. Yerokun, DRP
L. Nicholson, DRP
S..Greenlee,
R. Lobel, OEDO
R. Capra, NRR
J. Menning, NRR
D. Brinkman, NRR
P. Boehnert, Chairman, ACRS
K. Raglin, AEOD