ML20043D288

Proposed Tech Specs Change Request 139,clarifying Limiting Condition for Operation of Safety Injection Accumulators

ML20043D288
Person / Time
Site:	Point Beach
Issue date:	06/01/1990
From:	WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML20043D282	List: ML20043D278 ML20043D288
References
NUDOCS 9006070331
Download: ML20043D288 (3)

Text

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f If either condition (1) or (2) cannot be met, specifications 15.3.0.A and 15.3.0.B become applicable. This specification is not applicable during cold shutcown or refueling shutdown conditions.

D. A momentary loss of normal or emergency power resulting in immediate corrective or required action in accordance with Table 15.3.5-2, i.e., placing associated channels into the trip condition or shutdown of the unit, shall nut be interpreted as causing a violation of the specification with respect to minimum operable channels or minimum degree of redundancy, unless said loss is the result of operator error or procedural violation.

Bases Specifications 15.3.0.A and 15.3.0.B delineate the action to be taken for circumstances not directly provided for in the action statements of the LC0 and whose occurrence would violate the intent of the specification. For example, Specification 15.3.3. A.2.a permits a single Reactor Coolant System accumt.lator l to be isolated for up to one hour during power operations. Under the terms of Specification 15.1 0.A and 15.3.0.B, if more than one accumulator is isolated or

< inoperable, the unit is required to be in hot shutdown within three hours of discovery of the condition and in the cold shutdown c.ondition within the following 45 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br /> unless corrective measures are completed. As a further example, Specifi-cation 15.3.3.B.2.b permits one Containment Spray Pump to be out of service for up to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> during power ope.'ations. Under the terms of these Specifications, if both of the required Containment Spray Pumps are inoperable, the unit is required to be in hot shutdown within three hours, and in the cold shutdown condition within the next 45 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br />. It is assumed the unit is brought to the required condition within the required times by promptly initiating and carrying out the appropriate statement.

Unit 1 Amendment No. 15.3.0-2 Unit 2 Amendment No.

9006070331 900601 PDR F,LiOCT 05000266 p PDC

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f. The isolation valves in.the discharge header of the high head U safety injection system are'in the open position,

g. All valves, interlocks, and piping associated with the above components.and required to function during accident conditions are operable.

h. During conditions of operation with reactor coolant system pressure in excess.of-l',000 psig, the source of AC power shall be removed from the accumulator isolation valves MOV-841A and B at the motor control center and the valves shall be open.

i. Power may be restored to MOV-841A and 8 for the purpose of valve l

testing or maintenance providing the testing and maintenance-is-completed and power is removed within four hours.

2. During power operation, the requirements of 15.3.3.A.1, Items b and c, may be modified to allow one of each of the following components to be inoperable at any one time.- If the system is not restored to meet the requiremen.ts of 15.3.3.A.1 within the time period specified, the reactor'shall be placed in the hot shutdown condition. If the require- ,

ments of 15.3.3. A.1 are not satisfied within an additional 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, the reactor shall be placed in the cold shutdown condition.

.a. One accumulator may' t,e isolated to perform a check valve leakage test or be otherwise inoperable for a period of up to one hour.

Before isolating an accumulator, the other accumulatar isolation valve shall be checked open.

b. One safety injection pur.p may be out of service, provided-the pump is restored to operable status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The other safety-injection pump shall 'be' tested'to. demonstrate operability prior to' initiating repair of the inoperable pump,

c. Any valve in these systems requit'ed to function during accident conditions may be' inoperable provided repairs are completed within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Prior to initiating repairs, all valves in the system that provide the duplicate function shall be tested to demonstrate operability.

3. During power operation, tha requirements of 15.3.3.A.1, Items d and e, may be modified to allow one of each of the following components to be inoperable at any oi.e time. If the component is not restored to meet Unit 1 Amendment 15.3.3-2 Unit 2' Amendment

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-s The operable $tMus of the various systems and components is to be demonstrated by periodic tests,. defined by Specification 15.4.5. A large fraction of 7

these tests will be p:.rformed while the reactor is cperating in the power range. -If a component is found to be inoperable it will be possible in most cases to effect repairs and restore the system to full operability within a relatively short time. For a single component to be inoperable

( does not negate the ability of the system to perform its function, but it reduces the redundancy provided in the reactor design and thereby limits the ability to tolerate additional equipment failures. To provide maximum assurance that the redundant component (s) wili operate if required to do so, the rc*'undant component (s) are to be tested or placed in continuous operation prior to initiating repair of the inoperable component. If it develops that (a) the inoperable component is not repaired within the specified allowable time period or (b) a second component in the same or related system is

- found to be inoperable, the reactor will initially be put in the hot shutdown condition to provide for reduction of the decay heat from the fuel, and consequent reduction of cooling requirements after a postulated loss-of-coolant accident. This will also permit improved access for repairs in some cases. After a limited time in-hot shutdown, if the malfunction (s) are not corrected, the reactor will be placed in the cold shutdown condition, 7 utilizing normal shutdown and cooldown procedures. For example, specification 15.3.3.A.2.a allows one accumulator to be isolated or otherwise inoperable for periods of up to one hour. An inoperable accumulator may be defined as one with

_ its outlet MOV shut, no pressure instrumentation operable, or water and/or nitrogen spaces cross-connected with' the accumulator on the other loop. If the inoperable accumulator is not restored within one hour then the conditions of specification 15.3,0. A and 15.3.0.8 apply which requires the af fected unit, if

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critical', to be in hot shutdown within three hours and in cold shutdown within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> if the condition is not corrected. In the cold shutdown condition there is

_ no possibility of an accident that would release fission products or damage the fuel elements.

The specified repair times do not apply to regularly scheduled maintenance of the engineered safety systems, which is normally to be performed during

{ refueling shutdowns. The limiting times to repair are based on:

15.3.3-7 s

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