ML19352A022
| ML19352A022 | |
| Person / Time | |
|---|---|
| Site: | Hartsville  |
| Issue date: | 07/18/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, NUDOCS 8102250471 | |
| Download: ML19352A022 (2) | |
Text
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TENNESSEE VALLEY AUTHORITY
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'd July 18, 1980 Mr..fa=es P. O'Reilly, Director Uffice of Inspection and Enforcement U.S. Nuclear Ref,ulatory Commission Region II - Suite 3100 101 Marietta screet Atlanta, Ceorgia 30303
Dear Mr. O'Reilly:
HARTSVILLE NUCLEAR PLANT - REPORTABLE DEFICIENCY - HEATERS OMITTED FRCM MOTOR OPERATOR Initial notificatien of the subject deficiency was made to NRC-0IE, mapcc:or R. L'. Wright, on June 18, 1980. Ia compliance with paragraph 50.55(e) of 10 CFR Part 50, enclosed is the final report of the subject deficiency.
If you have any questions, please call Jim Domer at FTS B57-2014.
Very truly ycurs, TENNESSEE VALLEY AUTHORITY O
L.M. Mills,N.anage)r Nuclear Regulatien and Safety Enclosurc y
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Mr. Victor Stello, Director (Enclosure)
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.s ENCLCSUPE HARTSVILLE NUCLEAR ?LMT. NIT.'s-1 HEATERS CMITTED FRC.y. MOTOR CPE?ATCR 10CFR50.55(e)
NCR HNP A-097 REPCRT NO. 1 (FINAL)
On June 18, 1950, TVA infor ed WC-CIE '?Pon II Int:ecter R. 'l.
'4ript cf a potentially recortable conditi:n uncer ICCFR50.55(e't -epPg ne caission of a heater from a motor operator manufactured oy Relian:e Electric Company, Cleveland, Ohio. This is the #inal report en this deficiency.
Descricticn of Ceficiency The reacter ccre isclation cooling (RCIC) turbine steam inlet valve (Limitorcue) utilizes a dc me:ce ccerator manufactured by Reitance.
This ecuipment was supplied by Terry Steam Turbine Ccmpany, Wincscr.
Ccnnecticut.
The ac:ce scecification recuires ett : er ven: er.r be installed.
The purpose cf the M r 3 :: - - = e r. : :: v n:Sn ":.
forming insice the motor. As a part of preventive maintenance, the heaters were to be energi:ed while the motors were in storage to prevent the motor frca being damaged by water.
However, cne heater failed to energi:e.
As a result, the motor was disassembled and it was disccvered that the motor had no heating element installed.
This type of motor is utilized en ene RCIC turbine steam inlet valve per unit (total of four).
The deficient motor was assigned to unit A1.
The other three motors have been examined and it has been verified that the heaters were properly installed in the remaining compenents.
Two similar units are at Phipps B'r.d Nuclear Plan *, [cne per unit). These will be examined to verify that the appropriate hesters have been installed.
Safety Imelications The RCIC turbine steam inlet valve is normally closed and is opened cnly when the reactor is isolated from the main condensers. When the valve is cpen, steam is routed to the RCIC turbine which is used to drive the RCIC pump in order to provide sufficient water for core cooling during shutdown.
If water were to form inside the r.otor in sufficient quantities to cause a short circuit upcn energizing the motor, the valve would be rendere; inoperable.
Therefore, the RCIC system wculd be disabled.
During plant shutdown (with reactor isolated) or a rod drop accident, this situation wculd leac to insufficient water in the core and initiation of Emergency Core Cooling Systems (ECCS).
The RCIC is not an essential recuirement for safe shutdown of the plant. Hewever, since RCIC is the preferred mcde of cooling, its loss reduces the plant's safety margin and could lead to an abnormal plant condition whicn might affect plant safety.
Corrective Action The deficient motor will be replaced. TVA anticipates that the motor will be replaced by November 30, 1980.
GE, who is responsible for administration of the contract for the purchase of the subject equipment, will review the vendor QA program to provide
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assurance that it is being properly implemented.
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