ML20107E374

Proposed Tech Specs,Allowing Use of Improved Fuel Rod Bowing Evaluation Methodology to Reduce Rod Bowing Penalty on Nuclear Enthalpy Hot Channel

ML20107E374
Person / Time
Site:	North Anna
Issue date:	02/14/1985
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20107E361	List: ML20107E359 ML20107E374
References
NUDOCS 8502250547
Download: ML20107E374 (7)

Text

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ENCLOSURE 2 850225054'1 850214 PDR ADOCK 05000330 P PDR

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TECHNICAL SPECIFICATION CHANGES NORTH ANNA UNIT 1 l

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• POWER DISTRIBUTION LIMITS NUCLEAR ENTHALPY HOT CHANNEL FACTOR - F H

LIMITING CONDITION FOR OPERATION 3.2.3 F AH shall be limited by the following relationship-F H s1.55 [1 + 0.3 (1-P)]

THERMAL POWER where: P= RATED THERMAL POWER APE LICABILITY: MODE 1.

ACTION _:

With FAH exceeding its limit:

, a. Reduce THERMAL POWER to less than 50% of RATED THERMAL POWER within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and reduce the Power Range Neutron Flux-High Trip Setpoints s 55% of RATED THERMAL POWER within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />,

b. Demonstrate through in-core mapping that H

is witMn its limit '

within 24' hours after exceeding thc' limit or reduce THERMAL POWER to less than 5% of RATED THERMAL POWER within the next 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, and

c. Identify and correct the cause of the out of limit condition prior to increasing THERMAL POWER above the reduced limit required by a o b, above; subsequent POWER OPERATION may proceed provided that is demonstrated through in-core mapping to be within its limit AH at a nominal 50% of RATED THERMAL POWER prior to exceeding this THERMAL POWER, at a nominal 75% of RATED THERMAL POWER prior to exceeding this THERMAL POWER and within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after attaining 95%

or greater RATED THERMAL POWER.

NORTH ANNA - UNIT 1 3/4 2-9

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TECHNICAL SPECIFICATION CHANGES NORTH ANNA UNIT 2 D

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POWER DISTRIBUTION LIMIT _S NUCLEAR ENTHALPY HOT CHANNEL FACTOR - F H

LIMITING CONDITION FOR OPERATION 3.2.3  ?

H shall be limited by the following relationship:

H s1.55 [1 + 0.3 (1-P)]

• - THERMAL POWER where: P= RATED THERMAL POWER l

APPLICABILITY: MODE 1.

ACTION:

With F H exceeding its limit:

a. Reduce THERMAL POWER to less than 50% of RATED THERMAL POWER within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and reduce the Power Range Neutron Flux-High Trip Setpoints to less than or equal to 55% of RATED THERMAL POWER within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />,

b. Demonstrate through in-core mapping that F is within its limit H

within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after exceeding the limit or reduce THERMAL POWER to less than 5% of RATED THERMAL POWER within the next 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, and '

c. Identify and correct the cause of the out of limit condition prior to increasing THERMAL POWER above the reduced limit required by a o b, above; subsequent POWER OPERATION may proceed provided that

' is dem nstrated through in-core mapping to be within its limit AH at a nominal 50% of RATED THERMAL POWER prior to exceeding this THERMAL POWER, at a nominal.75% of RATED THERMAL POWER prior to NORTH ANNA - UNIT 2 3/4 2-9 L

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NORTH ANNA'- UNIT 2 3/4 2-11