ML20153C218
| ML20153C218 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/07/1986 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8602190045 | |
| Download: ML20153C218 (3) | |
Text
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TENNESSEE VALLEY AUTHORITY i
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SN 157B Lookout Place r,
February 7, 1986 ca t5 BLRD-50-438/86-03 BLRD-50-439/86-02 5
C 7-U.S. Nuclear. Regulatory Commission Region 11 D
Attention:
Dr. J. Nelson Grace, Region'ai Administrator
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101 Marietta Street, NW,. Suite 2900 Atlanta,. Georgia 30323
Dear Dr. Grace:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - UNQUALIFIED SOLENOIDS / LIMIT SWITCllES ON B&W SUPPLIED AUXILIARY SYSTEM VALVES - BLRD-50-438/86-03, BLHD-50-439/86-02
- FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector Al Ignatonis on January 8, 1986 in accordance with 10 CFR 50.55(e) as SCRjBLN EEB 8546.
Enclosed is our final report.
If there are any questions,;pleace get in touch with R. H. Sholl at
.FTS 858-2688.
,Very truly yours, F
L., > '
, TENNESSEE VALLEY AUTHORITY
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R.
L. Gridley Manager of Licensing y
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Enclosure cc:
Mr. James Taylor Dir(ctor (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Comtaission
,T-washington, D.C.
20555 s
Records Center (Enclosure)
Institute of Huclear Power Operations 1100 circle 75. Parkway, Suite'1500 Atlanta, Georgia 30339 8602190045 860 438 PDR ADOCK 0 PDR S
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An Equal Opportunity Employer i
D ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 UNQUALIFIED SOLENOIDS / LIMIT SWITCHES ON B&W SUPPLIED AUXILIARY SYSTEM VALVES BLRD-50-438/06-03 AND BLHD-50-439/86-02 SCR BLN EEB 8546 10 CFR 50.SS(e)
FINAL REPORT peseription of Deficiency In response to a generic concern initiated by nonconformance reports (NCRs)
BLN EEB B307 and BLN BLp 8324 (BLRD-50-438/83-34 and BLRD-50-439/83-30), a review of all pneumatic control valves supplied under the Bellefonte Nuclear Steam Supply System (NSSS) contract was conducted. The review was designed to identify those valves.having accessories (pilot solenoid valves / limit switches) used in IEEE Class IE applications that are not qualified for Class IE service. The review found that this conditio0 applies to the following valves:
Valve Function 1,2WG-IFCV-012-A Reactor Coolant Drain Tank Vent Isolation Valve 1,2WL-IFCV-06/-A Reactor Building Normal Sump Pump Isolation Valve-l 1,2WL-IFCV-091-A Reactor Coolant Drain Tank Cooler Isolation Valve-1,2WL-IFCV-121-A Reactor Coolant Drain Tank Cooler isolation Valve 1,2NV-IFCV-036-A Hakeup Letdown Isolation Valve l.2NV-IFCV-119-A Reactor Ceulant/ Makeup Isolation Valve 1,2CA-lLCV-062-B Auxiliary Feedwater Control Valve 52 1,2CA-ILCV-053-A Auxiliary Feedwater Control Valve-1,2CA-ILCV- 063-A Auxiliary Feedwater Control Valve 1,2CA-ILCV-052-D Auxiliary Feedwater Control Valve 1,2ND-IFCV-064-A Decay Heat Cooler Outlet Valve 1,2ND-IFCV-158-B Decay Heat Cooler Outlet Valve The Babcock and Wilcox (B&W) equipment specifications for these valves did not impose Class IE qualification requirements on the valve vendors. The specifications were originally issued in June 1913, prior to tue issuance of IEEE 323-1914 (which set the standards for class IE qualification) and before there were class IE qualified devices commercially available. Subsequent review of the specifications by TVA did not detect the omission of the qualification requirements because of the failure of the reviewers to recognize which equipment must meet Class IE standards.
The generic implication of the above deficiency was evaluated for the balance of the Bellefonte valves (and valves at other TVA plantu) as part of a generic condition review conducted in response to UCRs BLU EEB 8307 and BLN BLP 8324
a safety Imp,lications Had the presence of the unqualified devices _gone undetected, the probability of an accessory failure would have increased. Since an accessory failure can caure a valve to become inoperable, the probability of a valve. failure also would have increased. The increased probability of a valve failure in the subject systems (decay heat, auxiliary feedwater control, and waste disposal) could reduce the ability of those systems to perform their intended safety function under certain dosign basic conditions. Accordingly, the uncorrected deficiency has the potential to adversely affect the safe operation of the plant.
Corrective Action The affected limit switches / solenoids will be replaced with accessories qualified for IEEE Class lE power applications.
B&W will prepare a field change package (FCP) to document the installation of the new devices.
All-construction activition will be complete by six months before fuel loading of the applicabic unit.
To prevent recurrence of the subject problem, all TVA employees involved in specification of electrical equipment have been alerted that any electrical equipment with an A, 3, D, E, F, G, or S division designation in its TVA UNID number is class IE and must be specified as such for procurement purposes.
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l 0 Safety Imp,lications Had the presence of the unqualified devices gone undetected, the probability of an accessory failure would have increased.
Since an accessory failure can cause a valve to become inoperable, the probability of a valve failure also would have increased.
The increased probability of a valve failure in the subject systems (decay heat, a'uxiliary feedwater control, and waste disposal) could reduce the ability of those systems to perform their intended safety function under ccetain dasign basic conditions. Accordingly, the uncorrected deficiency has the potential to adversely affect the safe operation of the plant.
Correctise Action The affec:.ed limit switches / solenoids will be replaced with accessories qualified for IEEE Class lE power applications.
B&W will prepare a field change package (FCP) to document the installation of the new devices. All construction activities will be complete by six months before fuel loading of the appilcable unit.
To prevent recurrence of the subject problem, all TVA employees involved in specification 01 electrical equipment have been alerted that any electrical equipment with an A, B, D, E, F, G, or S division designation in its TVA'UNID
. number is class IE and must be specified as such for procurement purposes.
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