ML20050C734

Tech Spec 3/4.7.9 Changing Surveillance Requirements for Snubbers

ML20050C734
Person / Time
Site:	Sequoyah
Issue date:	04/07/1982
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20050C733	List: ML20050C732 ML20050C734
References
NUDOCS 8204090307
Download: ML20050C734 (3)

Text

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ENCLOSURE 1

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I PROPOSED TECHNICAL SPECIFICATION CHANGE ,'

I FOR SEQUOYAH NUELEAR PLANT 8204090307 820407 PDR ADOCK 05000327 p PDR

PLANT SYSTEMS 3/4.7.9 SNUBBERS LIMITING CONDITION FOR OPERATION 3.7.9. All safety-related snubbers shall be OPERABLE. The snubbers are shown -

in Tables 4.7.9.a and 4.7.9.b and are listed in Surveillance Instruction SNP SI-162. Any exemptions to the surveillance program are shown in Table 4.7.9.c '

and in SNP SI-162.

APPLICABILITY: MODES 1,2, hand 4. (MODES 5 and 6 for snubbers located on systems or partial systems required OPERABLE in those MODES.) .

ACTION: i With one or more snubbers inoperable, within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> replace or restore the  !

inoperable snubber (s) to OPERABLE status and perform an engineering evaluation on the attached component or declare the attached system inoperable and follow the appropriate ACTION statement for that system.

SURVEILLANCE REQUIREMENTS 4.7.9. Each safety-related snubber shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program and the requirements of Specification 4.0.5. These snubbers are shown in Tables 4.7.9.a and 4.7.9.b, and are listed in Surveillance Instruction SNP SI-162. Table 4.7.9.b is a detailed tabulation of the hydraulic snubbers which are also shown in Table 4.7.9.a. Any exemption to any portion of the surveillance program for any snubber is shown in Table 4.7.9.c.

a. Inspection Groups The snubbers may be categorized into two major groups based on whether  ;

the snubbers are accessible or inaccessible during reactor operation.

These major groups may be further subdivided into subgroups based on design, environment, or other features which may be expected to affect the OPERABILITY of the snubbers within the subgroup. Each subgroup or group may be inspected independently in accordance with 4.7.9.b thrcagh 4.7.9.h. i

b. Visual Inspection Schedule and Lot Size The first inservice visual inspection of snubbers shall be completed by October 31, 1981, and shall include all snubbers on safety-related systems.

If less than two (2) snubbers are found inoperabic during the first inserv. ice visual inspection, the second inservice visual inspection shall be performed 18 months i 25% from the date of the first inspection, or during an outage of sufficient duration (at least 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> in mode 5),

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SEQUOYAH - UNIT 1 3/4 7-21 p -

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ENCLOSURE 2 JUSTIFICATION FOR PROPOSED TECEINICAL SPECIFICATION The purpose of this change is to allow continued power operation after the "12 month + 25" time period, thus preventing a " forced outage" to perform the required visual inspection. The visual inspection will be performed at the next outage of sufficient duration (at least 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> in mode 5) not to exceed the "18 month + 25" time period. Based on the results of the first inservice inspection which revealed no snubbers inoperable, the probability of an occurrence or the consequences of an accident or malfunction of equipment impo" tant to safety previously evaluated in the FSAR is not increased.

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