ML20117K655

Proposed Tech Specs,Providing Revised TS Pages 3/4.5-7 & 3/4.5-6

ML20117K655
Person / Time
Site:	Pilgrim
Issue date:	09/05/1996
From:	BOSTON EDISON CO.
To:
Shared Package
ML20117K653	List: ML20117K650 ML20117K655 ML20117K661
References
NUDOCS 9609120071
Download: ML20117K655 (3)

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i ATTACHMENT B REVISED T.S. PAGES 3/4.5 7 AND B3/4.5-6 l

9609120071 960905 PDR ADOCK 05000293 P PDR '

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, LIMITING CONDITION FOR OPERATION SURVEILLANCE REOUIREMENT 3.5 CORE AND CONTAINMENT COOLING 4.5 CORE AND CONTAINMENT SYSTEMS (Cont) COOLING SYSTEMS (Cont) l F. Minimum Low Pressure Cooline and Diesel F.

Generator Availability Minimum Low Pressure Cooline and l Diesel Generator Availability

, 1 During any period when one emergency

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1. When it is determined that one l diesel generator (EDG) i,s inoperable, l continued reactor operation is EDG is inoperable, within 24 permissible only duimg the succeeding hours, determine that the operable 14 days unless such ED6 is sooner EDG is not inoperable due to a made operable, provided that: common cause failure,

! a) all of the low pressure core and E

, containment coohng systems are - perform surveillance 4.9.A.I.b.2 operable and the remammg EDG is operable m accordance with 4.5.F.1. If for the operable EDG' this requirement cannot be met, an l orderly shutdown shall be initiated and AND j the reactor shall be placed in the Cold once every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> verify correct Shutdown Condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. ~

breaker alignment and indicated AND Power availability for each offsite circuit, b) the Station Black Out-Diesel Generator is verified operable in i I

l accordance with 4.5.F.2. If this l

l requirement cannot be met, the reactor 2. When it is determined that one EDG 1 l shall be placed in the Cold Shutdown is inoperable, within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, l Condition within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. determine that SBO-DG is not inoperable due to a common cause failure,

2. Any combination ofinoperable l components in the core and containment coohng systems shall not defeat the OR capability of the remaining operable components to fulfill the cooling functions' Perform a surveillance to demonstrate that the SBO-DG is

3. When irradiated fuel is in the reactor Operable.

vessel and the reactor is in the Cold Shutdown condition, both core spray AND systems, the LPCI and containment cooling systems may be ino erable, provided no work is being one which once every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> verify correct has the potential for draining the SBO-DG breaker alignment to the reactor vessel, emergency bus associated with the j inoperable EDG.

l 4. During a refueling outage, for a period of 30 days, refueling operation may

! continue provided that one core spray system or the LPCI system is operable or Specification 3.5.F.5 is met, i

Amendment No. M,4M 3/4.5-7

D BASES:

3.5 CORE AND CONTAINMENT COOLING SYSTEMS (Cont) occur. A potential draining of the reactor vessel (via control rod blade leakage) would allow i this water to enter into the torus and after approximately 140,000 gallons have accumulated (needed to meet minimum NPSH requirements for the LPCI and/or core spray pumps), the torus would be able to serve as a common suction header. This would allow a closed loop  :

operation of the LPCI system ara the core spray system (once re-aligned) to the torus. In addition, the other core spray system is lined up to the condensate storage tanks which can supplement the refuel cavity and dryer / separator pool water to provide core flooding, if required.

l The maximum allowed out-of-service (OOS) time for one EDG is 14 days. If the SBO-DG is determined to be inoperable, the maximum allowed OOS time for one EDG is 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. If the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> EDG OOS time is entered during the last three days of the 14 day EDG OOS time, the 14 day OOS time will control (i.e., the 14 day OOS time cannot be extended by entering the 72 day OOS time).

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, The SBO-DG is operable ifit is capable of energizing the safety bus associated with the inoperable EDG. ,

Specification 3.9 must also be consulted to determine other requirements for the diesel generators.

G. Deleted t

H. Maintenance of Filled Discharge Pine If the discharge piping of the core spray, LPCI system, HPCI, and RCIC are not filled, a l water hammer can develop in this piping when the pump and/or pumps are started. An ,

I analysis has been done which shows that if a water hammer were to occur at the time at which the system were required, the system would still perform its design function. However, to minimize damage to the discharge piping and to ensure added margin in the operation of these systems, this Technical Specification requires the discharge lines to be filled whenever the system is in an operable condition.

An acceptable method of ensuring that the lines are full is to vent at the high points. The monthly frequency is based on the gradual nature of void buildup in the ECCS piping, the procedural controls, and operating experience.

4 Amendment No. 39,135, M9,157 B3/4.5-6 i

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