ML20106C499

Proposed Tech Spec Allowing Positive Moderator Temp Coefficient at Reduced Power Levels in Reactivity Control Sys

ML20106C499
Person / Time
Site:	North Anna
Issue date:	02/07/1985
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20106C480	List: ML20106C475 ML20106C499
References
NUDOCS 8502120285
Download: ML20106C499 (2)

Text

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-REACTIVITY CONTROL SYSTEMS MODERATOR TEMPERATURE COEFFICIENT LLIMITING CONDITION FOR OPERATION 3.1.1.4' The moderator temperature coefficient (MTC) shall be:

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- za. For, the' a ~gl rods withdrawn, beginning of core life condition

,s 0.6.x 10 Ak/k/*F below 70 percent RATED THERMAL POWER

!s 0.0 x.10 Ak/k/*F at or above 70 percent RATED THERMAL POWER

!b. = Less negative than -4.0.x 10-4 Ak/k/*F for the all rods withdrr<wn, end of core life at RATED THERMAL. POWER.

- APPLICABILITY: Specification 3.1.1.4.a - MODES 1 and 2* only#

Specification 3.1.1.4.b - MODES 1, 2 and 3 only#

- ACTION:

a.' With,the MTC.more positive than the limit of 3.1.1.4.a above:

1. - ' Establish and maintain control: rod withdrawal limits sufficient to-testore the MTC to within its limit within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in HOT STANDBY within the - next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. These withdrawal limits

shall be ,in addition to the ineertion limits of Specification

3.1 ~. 3 . 6 .

2. Maintain the control rods within the withdrawal limits-established above_until subsequent measurement verifies that the MTC has been i resto:ed . to within its ' limit for the all ' rods withdrawn condition.

'3.- Prepara and submit a Special Report to.the Conunission pursuant to Specification 6.9.2 within 10 days, .. describing the value : of the measured MTC, the interim control rod eithdrawal. limits and the zpredicted average core burnup necessary for restoring the positive

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7 ~ MTC to within its limit for the all rods withdrawn condition.-

b. With the MTC more negative than the limit of 3.1.1.4.b ~ above, be 'in - -

., HOT SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

, *With K,ff21.0

1. See Special Test Exception 3.10.3 h

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REACTIVITY' CONTROL'dYSTEMS MODERATOR TEMPERATURE COEFFICIENT l

LIMITING CONDITION FOR' OPERATION J3.1.'1.4L'The'moderatorftemperature coefficient (MTC) shall be:

a.. For .the a rods withdrawn, beginning of core life condition

=

ls 0.6 x 10'}1 ~4 Ak/k/*F below 70 percent RATED THERMAL POWER

.c s 0.0.x 10 Ak/k/*F at or above 70 percent RATED THERMAL POWER b.- Less negative - than -4.0 -x 10- Ak/k/*F for the all rods withdrawn, end of. core' life at RATED THERMAL POWER.

4-APPLICABILITY: Specification 3.1.1.4.a - MODES'1 and 2* only#

Specification 3.1.1.4.b - MODES 1, 2 and 3 onlyf

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ACTION:

a. . With the MTC more positive than the limit of-3.1.1.4.a above:

1. Establish and maintain control rod withdrawal limits sufficient to restore.the MTC to within its limit within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in HOT STANDBY within : the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. These withdrawal limits shall be <in addition to the . insertion .' limits of Specification 3.1.3.6.

'2. : Maintain the 1 control- - rods within the - withdrawat limits established above untti-subsequent measurement verifies that'the MTC : has been restorsd . to ' within its limit' for' the ' all rods -

withdrawn condition.

3.- Prepare and submit-a Special Report to:the Commission pursuant to.

Specification 6.9.2 within 10 days, ' describing the value 'of the

measured MTC, the interim control rod withdrawai ' limitsand the

-predicted average core burnup necessary for restoring the positive MTC to within'its limit for.the all rods wichdrawn condition.

-b; Withithe MTC more negative than the' limit of. 3.1.1.4.b above, be in -

6 ' HOT SHUTDOWN within 12' hours.:

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_fSee Special Test Exception 3.10.3'

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