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:

~gl rods withdrawn, beginning of core life condition za.

For, the' a

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,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

!. = Less negative than -4.0.x 10-4 Ak/k/*F for the all rods withdrr<wn, b

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 to within its ' limit for the all ' rods withdrawn condition.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

~

~ MTC to within its limit for the all rods withdrawn condition.-

7 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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) LvT 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 Ak/k/*F below 70 percent RATED THERMAL POWER

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=

.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

ACTION:

g

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

a.

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 -

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' HOT SHUTDOWN within 12' hours.:

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- *With K;ff21.0.

_fSee Special Test Exception 3.10.3'

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