ML20116N827

Proposed Tech Spec 3.6.1.3 Re Containment Air Locks, Expanding & Clarifying Action Requirements & Adding Footnote to Surveillance Requirement 4.6.1.3b,making Provisions of Tech Spec 4.0.2 Inapplicable

ML20116N827
Person / Time
Site:	North Anna
Issue date:	05/02/1985
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20116N819	List: ML20116N814 ML20116N827
References
NUDOCS 8505070367
Download: ML20116N827 (10)

Text

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I 8505070367 850502 gDR ADOCK 05000338 PDR

CONTAINMENT SYSTEMS CONTAINMENT AIR LOCKS LIMITING CONDITION FOR OPERATION 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 lock door shall be closed, and

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

P,, greater than or equal to 40.6 psig.

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

a. With one containment air lock door inoperable:

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

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

3. Otherwise, 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 />.

4. The provisions of Specification 3.0.4 are not applicable.

b. With a containment air 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 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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l NORTH ANNA - UNIT 1 3/4 6-4 L

SURVEILLANCE REQUIREMENTS 4

4.6.1.3 Each containment air lock shall be demonstrated OPERABLE: ,

.a. *Within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> following closing, except.when the air lock is being used for multiple entries, then at least' once per 72 . hours, by verifying that the seal leakage is less than 0.01 L as determined by precision flow measurements when measured for at*1 east 30 seconds with the volume between the seals at a pressure of greater than or equal to 40.6 psig.

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i~ b. At least once per 6 months by conducting an overall air lock akage test at greater than or equal to P , 40.6 psig, and by ver:.f; ng that i the overall' air lock leakage rate Is within its limit , and

c. At least once per 18 months during shutdown by verifying that only.

1 one door in each air lock can be opened at a time..

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i Exempt to Appendix J" of 10 CFR 50.

)TheprovisionsofSpecification4.0.2arenotapplicable.

i NORTH ANNA - UNIT 1 3/4 6-4a L

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l-l ATTACHMENT 2 i

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CONTAINMENT SYSTEMS CONTAINMENT AIR LOCKS LIMITING CONDITION FOR OPERATION 4

3.6.1.3 Each containment air lock shall be'0PERABLE with:

l 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 lock door shall be closed, and n

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

P,, greater than or equal to 40.6 psig.

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

a. With one containment air lock door inoperable:

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1. Maintain at least the OPERABLE air lock door closed and either 2

restore the inoperable air lock door to OPERABLE status within 24 g hours or lock the OPERABLE air lock door closed.

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, 2.- Operation may then continue until -performance of the next l required overall air lock leakage test-provided that the OPERABLE f

air lock door'is verified to be locked closed at least once'per ,

31 days.

l 3., Otherwise, 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 SHUIDOWN within the following 30. hours.

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i L 4. The provisions of Specification 3.0.4 are not applicable.

i b. With a containment air lock inoperable, except as the result of an l

inoperable air lock door, maintain at least one' air lock door closed;

-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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NORTH ANNA - UNIT 2 3/4 6-4 i

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l SURVEILLANCE REQUIREMENTS i

'4.6.1.3 Each containment air lock shall be demonstrated OPERABLE:

a. *Within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> following closing, except when the air lock is being used for multiple entries, then at least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, by verifying that the seal leakage is less than 0.01 L as determined by precision . flow measurements when measured for at *1 east 30 seconds

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with the volume between the seals at a pressure of greater than or equal to 40.6 psig.

b.C At least once per 6 months by conducting an overall air lock leakage c- ,f test at greater than or equal to P , 40.6 psig, and by verifying that the overall air lock leakage rate fs within its limit , and

c. At least- once per 18 months during shutdown by verifying that only one door in each air lock can be opened at a time.

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.gExempttoAppendix"J"of-IbCFR50. *

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The provisions of Specification 4.0.2.are'not applicable.

NORTH ANNA - UNIT 2 '3/4 6-5 o

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1 ATTACEfENT 3 R

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DISCUSSION OF PROPOSED TECHNICAL SPECIFICATION CHANGES t.

The proposed changes to the North Anna Unit 1 Technical Specifications are to expand and clarify the ACTION requirements of Technical Specification 3.6.1.3,' Containment Air Locks. In addition, a lootnote has been added to surveillance requirement 4.6.1.3b to make the provisions of Specification 4.0.2 not applicable. These . revisions will provide consistency betwe an

the North Anna 1 and 2 Technical Specifications and also with the

, Standardized Technical Specifications (STS) for Westinghouse PWR's, Revision 4 and Revision 5, Draft. The addition of the footnote also provides consistency between the Unit 1. Unit 2, STS and' the requirements of 10 CFR 50, Appendix J.-

A change to surveillance requirement 4.6.1.3a' is being proposed for North Anna Uniti Nos. 1 and 2. The proposed change is in the surveillance requirement for door seal leakage. The~ proposed change will reduce the amount of maintenance required on the containment air locks. By reducing the amount of maintenance required, the amount of ' personnel radiation exposure will be reduced.

4 Surveillance testing of the air- lock seals will continue to assure that the overall air. lock leakage will not become excessive due to seal damage

.during the ' intervals between air lock leakage test's. The overall air lock '

leakage limit' of 5 0.05 L g and the total type B and C leakage limit of 1 '

O.60 _ L , _will be unchanged. The proposed surveillance requirement for door seal . leakage limit _ of s - 0.01 L ,1s a small _part of either of the

, above limits and therefore does not constitute a significant change to the r-k

Technical Specifications.

It has been determined that an "unreviewed safety question," as defined in 10CFR50.59, does not exist because:

a. This change does not increase the probability of occurrence or the consequences of an accident or malfunction of equipment important

. to safety and previously evaluated 'in the final safety Analysis Report. The surveillance frequency remains unchanged, and the Air Lock leakage limits insure overall air lock integrity.

b. This change does not create a possibility for an accident or malfunction of a different type than any evaluated previously in the Final Safety Analysis Report. No physical or operational feature of the Air Lock is altered.

c. This change does not reduce the margir of safety as defined in the basis of any Technical Specificat. ion. The overall air lock leakage and the tote,1 type B and C test leakage limits established in 10CFR50 Appendix J remain unchanged. "

The proposed changes to Technical Specification 3.6.1.3 have be-en determined not to pose a significant hazards consideration as stated in the Federal' . Register dated April 6,

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1983. Example vil of examples of amendments that are considered not'11kely to involve a significant hazards ~

l l consideration states, "A change to make a license conform to changes in i

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- the regulations, where the license change results in very minor changes to

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facility operations clearly in . keeping with the regulations". The proposed- changes are consistent with' the Standardized Technical

. Specifications for Westinghouse PWR's, Revision 4 and Revision 5, Draft.

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