ML20198L436
| ML20198L436 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 10/20/1997 |
| From: | Collins E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Horn G NEBRASKA PUBLIC POWER DISTRICT |
| References | |
| 50-298-97-07, 50-298-97-7, NUDOCS 9710270041 | |
| Download: ML20198L436 (5) | |
See also: IR 05000298/1997007
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NUCLEAR REGULATORY COMMISSION
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ARLINoToN, TEXAS 740114064
OCT 201997
G. R. Horn, Senior Vice President
of Energy Supply
Nebraska Public Power District
141415th Street
Columbus, Nebraska 68601
SUBJECT: NRC INSPECTION REPORT 50 298/97 07
Dear Mr. Horn:
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Thank you for your letter of October 9,1997,in responso 's our letter and Notice
of Violation dated September 4,1997, involving inadequate procedures for routine testing
of the torus to-drywell vacuum breakers and valve RHR-MOV M0348. We have reviewed
your reply and find it responsive to the concerns raised in our Notice of Violation. We will
review the implementation of your corrective actions during a future inspection to
determine that full compliance has been achieved and will be maintained.
Sincerely,
O
Elmo E. Collins, Chief
Project Oranch C
Division of Reactor Projects
Docket No.: 50 298
License No.: DPR 46
cc:
John R. McPhail, General Counsel
Nebraska Public Power District
P.O. Dox 499
Columbus, Nebraska 68602 0499
P. D. Grahami Vice President of
Nuclear Energy
- Nebraska Public Power District
- P.O. Box 98
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B. L. Houston, Nuclear Licensing l
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Dr. William D. Leech '
MidAmerican Energy
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Mr. Ron Stoddard
Lincoln Electric System
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Lincoln, Nebraska 68508
Randolph Wood, Director
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P.O. Box 98922
Lincoln, Nebraska 68509 8922
. Chairman
Nemaha County Board of Commissioners
Nemaha County Courthouse
1824 N Street
. Auburn, Nebraska 68305.
Cheryl Rogers, LLRW Program Manager
Environmental Protection Section
Nebraska Department of Health
301 Cerrer.nlal Mall, South
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P.O. Box 95007
. Lincoln, Nebraske 68509 5007
David P. Schor, MD, MPH, FAAP
Low Level Radioactive Weste Program
HHS Regulation and Licensure
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P.O. Box 95007
Lincoln,' Nebraska 68509 5007_
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NLS970178
October 9,1997
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U.S. Nuclear Regulatory Commissioa
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Attention: Document Control Desk
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Gentlemen:
Subject:
Reply to a Notice of Violation
NRC Inspection Report No. 50-298/97-07
Cooper Nuclear Station, NRC Docket 50-298, DPR-46
Reference:
1.
Letter to G. R. Ilorn (NPPD) from T. P. Gwynn (USNRC) dated
September 4,1997, "NRC Inspection Report 50-298/97-07, Notice of
Violation"
By letter dated September 4,1997 (Reference 1), the NRC cited Nebraska Public Power District
(District) as being in violation of NRC reo,uirements. This letter, including Attachment 1,
constitutes the District's reply to the referenced Notice of Violation in accordance with
10 CFR 2.201. The District admits to the violation and has completed all of the corrective actions
necessary to return Cooper Nuclear Station (CNS) to full compliance with respect to the cited
violation.
This NOV response was due on October 6,1997, however, as explained in the October 7,1997
telephone call between CNS licensing and NRC personnel, extra time was required to provide a
full and accurate description of the cause of the events leading to the NOV and the appropriate
corrective actions required to prevent re-occurrence.
Should you have any questions concerning this matter, please contact me.
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Sincerely,
bel<w~
P. D. Graham
Vice President of Nuclear Energy
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NL.S970178
-' October 8,1997
Pt.ge 2
cc:
gional Administrator
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USNRC - Region IV
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Senior Project Manager
USNRC- NRR Project Directorate IV-1
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Senior Resident inspector
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Attachment 1
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to NLS970178 '
Page 1 of 2
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REPLY TO SEPTEMBER 4,1997, NOTICE OF VIOLATION'
COOPER NUCLEAR STATION
NRC DOCKET NO. 50-298, LICENSE DPR-46 -
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During NRC inspection activities conducted May 18 through June 28,1997, a violation of NRC ,
requirements was identified, The particular violation and the District's reply are set forth below:
Violation
TechnicalSpecipcation 6.3.3.A requires, inpart, that routine testprocedures be provided to
' satisfy operating license requirements, such as routine testing ofequipment required by the
TechnicalSpecifications.
Contrary to the abow:
1. On July 31, the trupector idennfied that Procedun 6.PC.308, "DrywellPressure
. Suppression Chamber Vacuum Breaker Calibration andFunctional Test, " a routine test
procedure, did not satisfy operating license requirements in that plant conditions caused a
differentialpressure across the torus-to drywell mcuum breakers during hftforce testing
which was not addressedin the acceptance criteria or evaluation offorces on the mlve.
' 2. On May 4,1997, Valw RilR-MOV-MO34B was tested with a routine test procedure which
was not qppropriate in that a modification of the valve was not reflected in the test stroke
time limit.
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Thisis a Sewrity Lew!IVviolation. (Supplement 1) (298/97007-05) .
Adminion or Denial to Violation
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The District admits the violation.
Reason for Violation
The apparent cause for this violation is a weakness in the post-maintenance and post-modification
testing processes ~which allowed specification of testing without verification that such testing is
' appropriate for the plant conditionsc
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Attachment 1
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to NLS970178
Page 2 of 2
Corrective Steos Taken and the Ramdts Achieved
The following immediate actions have been taken:
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1) Procedure 6.PC.308 was revised on August 1,1997, to require that the drywell and torus
ventilation are secured and drywell to torus vacuum breakers are opened to equalize the
pressure between the drywell and the torus prior to the performance of the test.
2) The torus-to-drywell surveillance test was performed following the above revision of
proccoure 6.PC.308 with satisfactory results.
- 3) Procedure 6.2RHR.201 was revised to include, in the IST Retest and Operability Limits, the
effects of the modification on the RHR-MOV-MO34B valve.
Corrective Stens That Will Be Taken to Avoid Further Violations
An assessment of the post maintenance / post-modification testing processes will be perfonned to
determine the effectiveness of these processes to specify the appropriate initial test conditions.
Date When Full Comoliance Will Be Achieved
The District is in full compliance with respect to the cited violation.
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ATTACHMENT 3
LIST OF NRC COMMITMENTS
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Correspondence No: NLS9701?B
The following table identifies those actions committed to by the District in this
document. Any other actions discussed in the submittal represent intended or
planned actions by the District. They are described to the NRC for the NRC's
information and are not regulatory cormitments.
Please notify the Licensing Manager
at Cooper Nuclear Station of any questions regarding this document or any associated
regulatory comrdcments.
COMMITTED DATE
COMMITMENT
OR OUTAGE
Revise procedure 6.PC.308 to require that the drywell and
torus ventilation are secured and drywell to torus vacuum
complete
breakers are opened to equalize the pressure between the
drywell and the torus prior to the performance of the
test
Revise procedure 6.2RHR.201 to include in the IST Retest
Complete
and Operability Limits the ef fects of the modification on
the RHR-MOV-MO34B valve
An assessment of the post-maintenance / post-modification
testing processes will be performed to determine the
January 20,1998
effectiveness of these processes to specify the
_ appropriate initial test conditions
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PROCEDURE NUMBER 0.42
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REVISION NUMBER 5
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PAGE 8 OF 9
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