ML20155J132

Final Deficiency Rept Re Omissions to Auxiliary Feedwater Pump Drawings.Initially Reported on 820225.Required Piping Will Be Designed & Placed on Appropriate Drawings

ML20155J132
Person / Time
Site:	Bellefonte
Issue date:	05/07/1986
From:	Gridley R TENNESSEE VALLEY AUTHORITY
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8605220006
Download: ML20155J132 (3)

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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374ot SN 157B Lookout Place

,i' N Ha , 1986 BLRD-50-438/82-20 BLRD-50-439/82-18 U.S. Nuclear Regulatory Commission Region II Attn: Mr. J. Nelson Grace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303

Dear Mr. O'Reilly:

BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - OMISSIONS TO AUKILIARY FEEDWATER PUMP DRAWINGS - BLRD-50-438/82-20, BLRD-50-439/82 FINAL REPORT The subject deficiency was initially reported to NRC-OIE Inspector R. V. Crlenjak on February 25, 1982 in accordance with 10 CFR 50.55(e) as NCR BLN BLP 8207. Enclosed is our final report.

If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.

Very truly yours, TENNESSEE VALLEY AUTHORITY R. L. Gridley, Director Nuclear Safety and Licensing Enclosure cc (Enclosure):

Mr. James Taylor, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Comission Washington, D.C. 20555 Records Center Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 8605220006 860507 PDR ADOCK 05000438 S PDR f

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M An Equal Opportunity Employer 1 ]

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Enciciura BELLEFONTE NUCLEAR PLANT UNITS 1 and 2 OMISSIONS TO AUXILIARY FEEDWATER PUMP DRAWINGS BLRD-50-438/82-20, BLRD-50-439/82-18 NCR BLN BLP 8207 10 CFR 50.559(e)

I F_NAL REPORT Description of Deficiency The auxiliary feedwater (AFW) pumps were supplied without vent, drain, and auxiliary feedwater turbine bearing cooling water interconnecting piping. The interface connections to the AFW pumps and tubines were supplied by the respective manufacturers with the assumption that TVA would provide the necessary design drawings and materials to meet the design requirements of TVA and the pump and turbine manufacturers.

The cause of this deficiency is failure to review system design for interface requirements and equipment specifications by the responsible engineers. The engineer's failure to review system design requirements was documented on nonconformance BLN MEB 8203 and reported to the NRC as construction deficiency report 50-438/82-31 and 50-439/82-28. The vents, drains, and tubine bearing cooling water interconnecting piping were not designed as a result of this deficiency. A review of the trend analysis data base revealed no similar documented deficiencies and a review of other work and/or systems being designed by the same responsible engineers showed no similar discrepancies.

Consequently the deficiency is considered an isolated case and there are no generic implications for other TVA plants.

Safety Implications The omission of these design considerations would prevent the AFW pumps and turbine from performing at the level specified in the FSAR and AFW design criteria and could result in loss of AFW pumps.

An auxiliary feedwater flow reduction below design specifications could result in insufficient transfer of decay heat from the reactor core. As a result, pressure in the reactor coolant system could exceed the design conditions compromising the integrity of the reactor coolant pressure boundary and increasing the probability of fuel damage. Therefore, if this condition had remained uncorrected, the safe operation of the plant could have been adversely affected.  ;

I Corrective Action Corrective action for the deficient condition will consist of designing and installing the required piping and placing it on the appropriate drawings.

The design work required is being performed under ECN 3289. ,,

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All action required to correct the deficient conditon for each unit will be completed no later than six months before unit 1 and unit 2 fuel load dates, respectively.

Due to the fact that the root cause of 'this deficiency was addressed in the final report on BLN MEB 8203, no further actions are required to prevent recurrence.

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