ML19296F114
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c Docket Re SEP 171980 RESULATORY DOCT.C'l CDPV MEMORANDUM FOR: ' Robert L. Tedesco, Assistant Director for Licensing Division of Licensing FROM:
Paul S. Check, Assistant Director for Plant Systems
- Division of Systems Integratton 1
SUBJECT AlfT0MATIC. INITIATION OF AUXILIARY FEE,DWATER SYSTEM FOR MCGUIRE NUCLEAR STATION UNITS 1 & 2-(TMI. CONCERN: ACTION PLAN ITEM II.E.1.2; NUREG-0578, SECTI0ff 2.1.7.a).
Plant Name: McGuire Nuclear Station, Units 1 & 2 Docket Nos: 50-369/370 Licensing Stage: OL-Milestone No: N/A
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Responsible Branch: LB #1
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Pmject Manager:
R. Birkel Review Status: Awaiting Information In response to TMI concerns, the applicant submitted information pertaining
~ to the automatic initiation of the auxiliary feedwater system (Action Plan Item II.E.1.2; NUREG-0578, Section 2.1.7 a). Following our review of this
-information, we identified a concern involvingLoperating bypasses which is described in-our safety evaluationwhich was forwarded to the Division of Licensing by meino (Paul Check to Robert ~ Tedesco) dated August 18, 1980.
Therefore, we regtest.that additional information be provided by-the
. applicant as described in the enclosure..
gg L Paul S. Check;
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w Paul'S { Check, Assistant Director
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for h ant Systems
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REQUEST FOR It' FORMATION Based on our review of your submitted information pertaining to automatic initiation of the auxiliary feedwater system (AFWS) (TMI Concern: Action Plan Item II.E.1.2; NUREG-0578, Section 2.1.7.a), we have concluded that the McGuire Units 1 & 2 AFWS automatic initiation meets all safety grade requirements with the exception of operating bypasses. The FSAR states that, during plant shutdown, the operator can manually defeat the automatic start of the auxiliary feedwater motor driven pumps on either low-low level in any steam generator or trip of both main feedwater pumps. The design does not include an autcmatic rerraval of this manual bypass feature.
This design is not in accordance with IEEE 279-1971 requi rement.4.12 (i.e., operating bypasses) which states that, where operating requirements necessitate automatic or manual bypass of a protective function, the design shall be such that the bypass will be removed automatically whenever permissive conditions are not met.
Therefore, it is our position that automatic removal of this manual bypass be provided in accordance with IEEE 279-1971 since possible failure to remove this operating bypass could prevent the AFWS from performing its automatic safety function.
Pleahe provide sufficient information (i.e.,
logic diagram, electrical schematics, etc.) to demonstrate compliance with our position as stated above.
Identify and justify any exceptions.
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