ML20236P351

Proposed Tech Specs Re Limiting Condition for Operation of Instrumentation Sys

ML20236P351
Person / Time
Site:	Rancho Seco
Issue date:	11/06/1987
From:	SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML20236P345	List: ML20236P341 ML20236P351
References
TAC-64359, NUDOCS 8711170256
Download: ML20236P351 (4)

Text

7  ;

RANCHO SECO UNIT 1 h TECHNICAL SPECIFICATIONS Limiting Conditions for Operation 3.5 INSTRUMENTATION SYSTEMS ,

3.5.1 OPERATIONAL SAFETY INSTRUMENTATION f l

Applicability Applies to unit instrumentation and control systems.  ;

l Qb.iective  ;

To delineate the conditions of the unit instrumentation and safety circuits .

necessary to assure reactor safety. l Specifications 3.5.1.1 Startup and operation are not permitted unless the requirements of Table 3.5.1-1, Colunns A and B are met. j 152* 3.5.1.2 In the event the number of protection or EFIC System channels i operable falls below the limit given under Table 3.5.1-1, Columns A j and B, operation shall be limited as specified in Column C. l In the event the number of operable Process Instrumentation channels is less than the Total Number of Channel (s), restore the .

inoperable channels to operable status within 7 days, or be in at least hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. If the number of operable channels is less than the minimum channels operable, either restore the inoperable channels to operable within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> j or be in at least hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. If the  ?

number of operable channels is two less than the minimum channels j operable, the reactor shall be made subcritical within four hours I and on decay heat cooling within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. )

P 3.5.1.3 For on-line testing or in the event of a protection instrument or )

channel failure, a key operated channel bypass switch associated  !

with each reactor protection channel will be used to lock the I channel trip relay in the untripped state as indicated by a light. l Only one channel shall be locked in this untripped state at any one i time. l 3.5.1.4 The key operated shutdown bypass switch associated with each reactor protection channel shall not be used during reactor power operation.

3.5.1.5 During startup when the intermediate range instrument comes on scale, the overlap between the intermediate range and the sourceo range instrumentation shall not be less than one decade. If the overlap is less than one decade, the flux level shall be maintained in the source range until the one decade overlap is achieved.

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C 1524 RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS j Limiting Conditions for Operation Table 3.5.1-1 (Continued)

INSTRUMENTS OPERATING CONDITIONS Action 1 - Hith the number of OPERABLE channels one less than the Total 1 Number of Channels, restore the inoperable channel to OPERABLE within 7 days, or be in at least hot shutdown within the next 12 i hours. j

' Action 2'- Hith the number of OPERABLE channels one'1ess than the Minimum I Channels Operable then put one of the inoperable channels in trip, and restore at least one of the inoperable channels to i OPERABLE within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be in at least hot shutdown within-the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

Action 3 - Hith the number of OPERABLE channels two less than the Minimum .

Channels Operable, be in at least hot shutdown within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> l and in cold shutdown within the following 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. ]

Action 4 - Hith the number of OPERABLE channels one less than the Total Number of Channels OPERABLE, restore the inoperable channel to OPERABLE within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, or be in at least hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

Action 5 - Hith the number of OPERABLE channels one less than the Minimum Channels Operable, restore one inoperable channel to OPERABLE within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in at least hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

Propored Amendment No. 152, Revision 2, Supplement 1 3-30c C 1---_ _