ML20135H955

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Proposed Tech Spec Changes,Clarifying Action Statement A.1 Re Entry Into Containment Air Lock for Repair of Inoperable Door.Safety Evaluation Encl
ML20135H955
Person / Time
Site: North Anna  Dominion icon.png
Issue date: 09/19/1985
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20135H952 List:
References
NUDOCS 8509250060
Download: ML20135H955 (6)
v • d • e


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ATTACllMENT I SUPPLEMENTAL REVISION TO PROPOSED TECliNICAL SPECIFICATION CllANGES FOR UNIT 1 t

8509250060 850919 ADOCK 05000338 PDR P PDR

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) CONTAINMENT SYSTEMS CONTATNMENT AIR LOCKS j LIMITING CONDITION FOR OPERATION l

} 3.6.1.3 Each containment air lock shall be OPERABLE with:

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a. Both doors closed except when the air lock is being used for normal

! transit entry and exit through the containment, then at least one air i lock door shall be closed, and i

b. An overall air lock leakage rate of less than or equal to 0.05 L at P,, greater than or equal to 40.6 psig.

APPLICABILITY: MODES 1, 2, 3 and 4 ACTION:

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i a. With one containment air lock door inoperable:

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j 1. Maintain at least the OPERABLE air lock door closed and either j restore the inoperable air lock door to 01 RABLE [

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hours or lock the OPERABLE air lock door closed status withinl I

l 2. Operation may then continue until performance of the next l required overall air lock leakage test provided that the OPERABLE I air loci door is verified to be locked closed at least once per l 31 days-i

3. Other,ise, be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in ~01, SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

! 4. The provisions of Specification 3.0.4 are not applicable.

b. With a containment ait lock inoperable, except as the result of an inoperable air lock door, maintain at least one air lock door closed;

) restore the inoperable air lock to OPERABLE statun within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

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+ Entry to repair the inner air lock door, if inoperable, is allowed.

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l NORTI' ANNA - UNIT 1 3/4 6-4 i

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ATTAClefENT 2 ' l SUPPLEMENTAL REVISION TO PROPOSED TECilNICAL i

i i SPECIFICATION CilANGES FOR UNIT 2 l

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CONTAINMENT SYSTEMS t

CONTAINMENT AIR LOCKS i

LIMITING CONDITION FOR OPERATION i

3.6.1.3 Each containment air lock shall be OPERABLE with:

a. Both doors closed except when the air lock is being used for normal transit entry and exit through the containment, then at least one air .

I lock door shall be closed, and

b. An overall air lock icakage rate of less than or equal to 0.05 L at a

l P,, greater than or equal to 40.6 psig.

APPLICABILITY: MODES 1, 2, 3 and 4 i

ACTION:

i a. With one containment air lock door inoperable: ,

l 1. Maintain at least the OPERABLE air lock door closed and either restore the inoperable air lock door to OPERABLE ,

hours or lock the OPERABLE air lock door closed. status within l 1 2. Operation may then continue until performance of the next

! required overall air lock leakage test provided that the OPERABLE j air lock door is verified to be locked closed at least once per 1

31 days.

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3. Otherwise, be in at least IIOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

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4. The provisions of Specification 3.0.4 are not applicable.

I t. With a containment air lock inoperable, except as the result of an l 1 inoperable air lock door, maintain at least one air lock door closed; t

restore the inoperable air lock to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be  !

!' in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. ,

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! + Entry to repair the inner air lock door, if inoperable, in allowed.

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NORTH ANNA - UNIT 2 3/4 6-4

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< .e SAFETY EVALUATION These proposed changes supplement the proposed changes submitted in VEPCO letter dated May 2, 1985 (Serial No.85-162). The supplemental changes clarify Action Statement A.1 of Technical Specification 3.6.1.3, Containment Air Locks.

Currently, Action Statement A.1 requires that with one containment air lock door inoperable, the operable air lock door must be maintained closed. This requirement is impractical if the inoperable air lock door is the inner door.

It would not be advisable from a safety standpoint or an ALARA standpoint to use the containment emergency hatch as an access point to make the necessary repairs. Maintenance personnel need to open the outer door to restore the inner air lock door to operable status. The proposed change is to add a footnote to Action Statement A.1 to provide an exemption to allow entry to repair the inner air lock door if it is inoperable.

The proposed Technical Specification changes do not: increase the probability of occurrence or the consequences of an accident or malfunction of equipment important to safety previously evaluated in .the UFSAR; increase the possibility of an accident or malfunction of a different type than previously evaluated in the UFSAR; or reduce the margin of safety as defined'in the Bases of any Technical Specification. The proposed changes clarify an existing requirement and are administrative in nature.

The supplemental proposed changes do not pose a significant hazards consideration as defined in 10 CFR 50.92. The Commission has provided examples of changes that constitute no significant hazards considerations in Federal Register, Volume 48, Page 14870. Example (1) consists of purely administrative changes to the technical specifications. The proposed changes clarify an existing requirement and are administrative in nature. Example (vii) consists of changes to make a license conform to changes in the regulations, where the license change results in very minor changes to facility operations clearly in keeping with regulations. The proposed changes were initiated as a result of and are consistent with discussions on interpretation of the Technical Specification held between station personnel and the Resident Inspector.

NATSC1/002

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