ML18033A968
| ML18033A968 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 09/29/1989 |
| From: | Michael Ray TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8910050055 | |
| Download: ML18033A968 (6) | |
Text
ACCELE RATED DlSTRJBUTI 0%
DEMONSTRATION SYPH'Zg REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ESSION NBR:8910050055 DOC.DATE: 89/09/29 NOTARIZED: NO DOCKET FACIL:50-259 Browns Ferry Nuclear Power Station, Unit 1, Tennessee 05000259 50-260 Browns.,Ferry Nuclear Power Station, Unit 2, Tennessee 05000260 50-296 Browns Ferry Nuclear Power Station, Unit 3, Tennessee 05000296 AUTH.NAME AUTHOR AFFILIATION RAY,M.J.
Tennessee Valley Authority RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Responds to NRC 890831 ltr re violations noted in Insp Repts 50-259/89-35,50-260/89-35
& 50-296/89-35.
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TITLE:"General (50 Dkt)-Insp Rept/Notice of Violation Response NOTES:1 Copy each to: B.Wilson,D.M.Crutchfield,B.D.Liaw,S.Black R.Pierson, 1 Copy each to: S.Black,D.M.Crutchfield,B.D.Liaw, R.Pierson,B.Wilson 1 Copy each to:
S. Black,D.M.Crutchfield,B.D.Liaw, R.Pierson,B.Wilson 05000259 05000260 05000296 RECIPIENT ID CODE/NAME PD IN RNAL: ACRS AEOD/DEIIB DEDRO NRR/DEST DIR NRR/DOEA DIR 11 NRR/DREP/RPB 10 NUDOCS-ABSTRACT OGC/HDS2 RES MORISSEAU,D EXTERNAL: LPDR NSIC NOTES:
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l ENNESSEE VALLEYAUTHORlTY CHATTANOOGA. TENNESSEE 37401 5N 1578 Lookout Place SEP 8> 1988 U.S. Nuclear Regula'tory Commission ATTN:
Document Control Desk Hashington, D.C.
20555 Gentlemen:
In the Matter of Tennessee Valley Authority
, Docket Nos.
50-259 50-260 50-296 BRONNS FERRY NUCLEAR PLANT (BFN)
UNITS 1, 2, AND 3 -
NRC INSPECTION REPORT NOS. 50-259/89-35, 50-260/89-35, AND 50-296/89-35
RESPONSE
TO NOTICE OF VIOLATION This letter provides TVA's response to the notice of violation transmitted by letter from B. A. Nilson to O.
D. Kingsley, Jr.,
dated August 31, 1989.
An unresolved item (50-259,260,296/89-08-03) was closed in this subject report and upgraded to a violation.
This violation was.cited for not complying with plant instructions.
TVA admits the violation and concludes that this incident was= because of personnel error.
The appropriate corrective actions are complete; therefore, no commitments are listed.
The enclosure provides background information and TVA's response to the NRC concern raised in the subject report.
If you have any questions, please telephone Patrick P. Carier at (205) 729-3570.
Very truly yours, TENNESSEE VALLEY AUTHORITY 7(~..
Manage
, Nuclear Licensing and Regulatory Affairs Enclosure cc:
See page 2
Pvi0050055 890929 PbF<
ADCiCK 0=01.>025~
9 FDC:
ggP An Equal Opportunity Employer
U.S. Nuclear Regulatory Commission cc (Enclosure):
Ms. S.
C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. B. A. Wilson, Assistant Director
. for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II-101 Marietta Street, NW, Suite 2900 Atlanta, Georgia.
30323 NRC Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637
- Athens, Alabama 35609-2000
ENCLOSURE
RESPONSE
NRC INSPECTION REPORT NOS. 50-259/89-35, 50-260/89-35, AND 50-296/89-35 LETTER FROM,B. A. HILSON TO 0.
D.
KINGSLEY DATED AUGUST 31, 1989 Technical Specification, Section 6.8.l.l.a, requires that written procedures shall be established, implemented, and maintained covering system operations.
Plant Managers Instruction 12.12, "Conduct of Operations,"
requires that the operator at the controls and the immediate supervisor must be continuously alert to plant conditions and ongoing activities affecting plant operations, including conditions external to the plant such as grid stability,.
meteorological conditions, and change in support equipment status; operational occurrences should be anticipated; alarms and off-normal conditions should be promptly responded to; and problems affecting reactor operations should be corrected in a timely fashion.
Contrary to the above, between 0400 and 1930 on February 10, 1989, the level in unit 1 Condensate Storage Tank dropped from a level of 26.7 feet to 10.1 feet in 2 1/2 hours.
This loss of approximately 200,000 gallons of water was not acted upon by control room personnel until the evening shift of the same day.
l.
Admission or Denial Of The Alle ed Violation (or Findin
)
t TVA admits the violation.
2.
Reasons For The Violation (or Findin
) If Admitted The violation was c-ited for not complying with plant instructions.
TVA concludes that the"violation was because of personnel error.
On February 9, 1989.at
- 0400, the Unit Operator noted that the level in the unit 1 Condensate Storage Tank (CST) had significantly decreased.
The operator incorrectly concluded that the CST level instrumentation had malfunctioned and indicated erroneously because of a cold weather condition.
The operator's failure to adequately investigate the abnormal condition was supported by the following facts:
The outside air temperature was approximately 20 degrees.
The CST level, instruments and temperature alarms had been affected by cold weather on many occasions in the past, Although an immediate attention "Maintenance Request (MR)" to check the CST level instrumentation was written, it was not performed in a timely manner for the off-normal condition.
Loss of water from CST continued on another shift.
Hhen the level decrease was noted, the operator observed the condensate transfer pumps were not operating.
Enclosure Page 2
At approximately
- 1600, an operator noted 'that both condensate transfer pumps were running and the condensate head tank's low level alarm was-initia'ted.
It was this additional indication that prompted operators to implement corrective actions to resolve -the abnormal condition". It was determined that the condensate head tank's level instrumentation had apparently frozen resulting in continuous condensate transfer pump operation and subsequent condensate head tank overflow.
The operator was waiting for the immediate MR to be completed to support their initial diagnosis.
- However, "Immediate Action" MRs are normally scheduled to be performed within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Operations personnel should have continued to follow up on this MR or should have written an emergency MR to ensure prompt implementation.
3.
'Corrective Ste s Which Have Been Taken And Results Achieved Operations personnel assessed the loss of CST level instrumentation and generated an immediate attention MR..
Operations personnel have reviewed Licensee Event Report 89-004 to ensure that they are made aware of lessons learned on the verification of conclusions and the accuracy of instrumentation.
The plant operators involved have been counseled to properly resolve abnormal conditions and to notify management of abnormal conditions.
Additionally, the heat tracing on the condensate head tank-was repaired.
Electrical Maintenance Instruction (EMI-46), "Freeze Protection Program,"
was revised to ensure adequate preventive maintenance on the heat tracing for tanks exposed to the environment.
This should preclude a recurrence of this event.
4.
Corrective Ste s Which Will Be Taken To Avoid Further Violations (or
~Findin s)
No further corrective actions are required.
5.
Date When Full Com liance Will Be Achieved Full compliance has been achieved.
i4 0'