Text

Proposed Tech Specs Providing Increased Flexibility for Acceptable Main Steam Safety Valve Surveillance Testing
	ML20134N488
Person / Time
Site:	Calvert Cliffs
Issue date:	08/29/1985
From:	; BALTIMORE GAS & ELECTRIC CO.
To:	;
Shared Package
ML20134N473	List: ML20134N472; ML20134N488;
References
	NUDOCS 8509050163
	Download: ML20134N488 (4)
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i 3/4.7 PLANT SYSTEMS 3.4.7.1 TUR8INE CYCLE SAFETY VALVES LIMITING CONDITION FOR OPERATION All main steam line code safety valves shall be OPERA 8LE.*

l 3.7.1.1 APPLICABILITY: MODES 1. 2 and 3.

ACTION:

With both reactor coolant loops and associated steam generators i

a.

in operation and with one or more main steam line code safety valves inog rable, operation in MODES 1. 2 and 3 may proceed provided, that within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , either the inoperable valve is restored to OPERABLE status or the Power Level-High trip set-point is reduced per Table 3.7-1; otherwise, be in at least HOT STAN0BY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOW within i

the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

j; b.

With one reactor coolant loop and associated sta a generator in operation and with one or more main steam line code safety valves associated with the operating steam generator inoperable, operation in MODES 1. 2 and 3 may proceed provided:

1.

That at least 2 main steam line code safety valves on the non-operating steam generator are OPERABLE, and -

t 2.

That within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , either the inoperable valve is restored to OPERA 8LE status or the Power Level-High trip setpoint.is reduced per Table 3.7-2; othenvise, be in at least HOT STAN08Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUT 00W within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

The provisions of Specification 3.0.4 are not applicable.

c.

l SURVEILLANCE REQUIREMENTS i

4.7.1.1 No additional Surveillance Requirements other than those required by Specification 4.0.5 are applicable for the main steam lime code safety valves of Table 4.7-1.

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3/4.7.1 TURBINE CYCLE 3/4.7.1.1 SAFETY VALVES The OPERABILITY of the main team line code safety valva.s ensures that the secondary system pressurat will be limited to withini'its design pressure of 1000 psig during the est severe anticipated system opera-tional transient, The maximum r lieving capacity is associated with a J

turbine trip frc~ 100". RATED T RMAL POWER coincident with an assumed m

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accordanc b Ith the requi M o N etion h and Pressure Code.1971 Edition he total relieving capacity for all valves f on all of, the steam lines is,12.18 x 108 lbs/hr #,ici, is 100 prc;.t Of

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'Q ugw PMAMA?H STARTUP and/or POWER OPERATION is allowable with safety valves inoperable within the limitations of.the ACTION requirements on the basis of '1e reduction in secondary system steam flow and THERMAL POWER required by the reduced reactor trip settings of the Power Level-High channels.

The reactor trip setpoint reductions are derived on the following bases:

For two loop operation SP = III ~ (Y)IY) x 106.5

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X Forsingleloopoperation(tworeactorcoolantpumps operating in the same loop) 3p, (X)

(Y)(U) x 46.8 where:

reduced reactor trip setpoint in percent of RATED SP

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In Mode 3 two main steam safety valves are required operable per steam generator.

These valves will provide adequate relieving capacity for removal of both decay heat and reactor coolant pump heat from the reactor coolant system via either of the two steam generators.

This requirement is provided to facilitate the post-overhaul setting and operability testing of the safety valves which can only be conducted een the RCS is at or above 500'F.

It allows entry into Mode 3 with a minimum number of main steam safety valves operable so that the set pressure for the remaining valves can be adjusted in the plant.

This is the most accurate means for adjusting safety valve set pressures since the valves will be in ther-mal equilibrium with the operating environment.

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ML20134N488

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