ML20079B415

Proposed Tech Specs 4.10.1.2,extending Time Prior to Reduction of Shutdown Margin, Special Test Exceptions, Shutdown Margin Surveillance Requirements

ML20079B415
Person / Time
Site:	Millstone
Issue date:	06/10/1991
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20079B406	List: B13830, Application for Amend to License DPR-65,changes Time Prior to Reduction of Shutdown Margin for Special Test Exceptions Shutdown Margin Surveillance Requirements ML20079B415
References
NUDOCS 9106170047
Download: ML20079B415 (2)

Text

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Docket No. 50 310 EMB10 l

Hillstone Nuclear Power Station, Unit No. 2 I

Proposed Changes to Technical Specific 6tions 4

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l June 1991 9106170047 910610

{DR ADOCK 05000336 PDR

3.4.10 SPEC 1 AL 1EST QCE110ld

$11MlQQ.WN MARGill 1

L IMITING (ONDITION F0fL,0PERATI.QLi 3.10.)

The SHU100WN MARGIN requirement of Specification 3.1.1.1 may be suspended for measurement of CEA worth and shutdown margin provided reactivity equivalent to at least the highest estimated CEA worth is available for trip insertion from OPERABLE CEA(s).

AP_PLLCA01 Lily: MODES 2 and 3.

AC110!f:

a.

With any full length CEA not fully inserted and with less than the above reactivity equivalent available for trip insertion, within 15 minutes initiate and continue boration at > 40 gpm of boric acid solution at or greater than the required refueling water storage tank (RWST) concentration (ppm) until the SHUTDOWN MARGIN required by Specification 3.1.1.1 is restored, b.

With all full length CEAs inserted and the reactor subcritical by less than the above reactivity equivalent, immediately initiate and continue boration at > 40 gpm of boric acid solution at or greater than the required refueling water storage tenk (RWST) concentration (ppm) until the SHUIDOWN MARGIN required by Specification 3.1.1.1 is restored.

}.VRVEllt ANCE RE0Vi_RLMEfHS 4.10.1.)

The position of each full length CEA required either partially or fully withdrawn shall be determined at least once per 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

4.10.1.2 Each CEA not fully inserted shall be demonstrated capable of full insertion when tripped from at least the 50% withdrawn position within 7 days prior to reducing the SHUTDOWN MARGIN to less than the limits of Specification 3.1.1.1.

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