ML20042C140

Proposed Tech Spec Change Allowing Plant Operation W/Containment Atmosphere Oxygen Concentration Greater than 4% by Vol & No Drywell Suppression Chamber Differential Pressure for One 48-h Period

ML20042C140
Person / Time
Site:	Cooper
Issue date:	03/23/1982
From:	NEBRASKA PUBLIC POWER DISTRICT
To:
Shared Package
ML20042C137	List: A820010, Application to Amend License DPR-46,revising Tech Specs to Allow Plant Operation W/Containment Atmosphere Oxygen Concentration Greater than 4% by Vol & No Drywell Suppression Chamber Differential Pressure ML20042C140
References
NUDOCS 8203300251
Download: ML20042C140 (2)

Text

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LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.7.A (cont'd.)

4.7.A (cont'd.)

c.

The total leakage between the dry-c.

Once each operating cycle, each vacuum well and suppression chamber shall breaker valve shall be visually in-be less than the equivalent leakage spected to insure proper maintenance through a 1" diameter orifice.

and operation of the position indication switch. The differential pressure set-point shall be verified, d.

If specifications 3.7.A.4.a. b or c, d.

Prior to reactor startup after each cannot be met, the situation shall refueling, a leak test of the drywell be corrected within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or the to suppression chamber structure reactor will be placed in a cold shall be conducted to demonstrate shutdown condition within the sub-that the requirement of 3.7.A.4.c s,equent 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

is met.

5.

Oxygen concentration 5.

Oxygen Concentration a.

After completion of the startup test a.

The primary containment o~vgen con-program and demonstration of plant centration shall be mease.d and electrical output, the primay con-recorded at least twice weekly.

tainment atmosphere shall be reduced to less than 4% oxygen with nitrogen gas during reactor power operation with reactor coolant pressure above 100 psig, except as specified in 3.7.A.5.b.

b.

Within the 24-hour period subsequent b.

The quantity of liquid nitrogen in to placing the reactor in the Run mode the liquid nitrogen storage tank shall following a shutdown, the containment be determined twice per week when the atmosphere oxygen concentration shall volume requirements of 3.7.A.5.c are be reduced to less than 4% be volume in effect.

and maintained in this condition.

De-inerting may commence 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to a shutdown.

c.

When the containment atmosphere oxygen concentration is required to be less than 4%, the minimum quantity of liquid nitrogen in the liquid nitrogen storage tank shall be 500 gallons.

d.

If the specifications of 3.7.A.5.a thru c cannot be met, an orderly shutdown shall be initiated and the reactor shall be in a cold shutdown condition j

within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, e.

The specifications of 3.7.A.5a thru d l

are not applicable during a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> l

continuous period between the dates of l

March 22, 1982 and March 25, 1982.

8203300251 820323 PDR ADOCK 05000298 P

PDR

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_o, LIMITING CONDITIONS FOR OPERATION SUF,VEILLANCE REQU1REMENTS 3.7 (cont'd.)

4.7 (cont'd.)

E.

Drywell-Suppression Chamber E.

Drywell-Suppression Chamber Differential Pressure Differential Pressure 1.

Differential pressure between the 1.

The pressure differential drywell and suppression chamber between the drywell and shall be maintained at equal to suppression chamber shall or greater than 1.47 psid except be recorded at least once as specified in a, b, and c below.

each shift.

a.

This differential shall be established within 26 hours3.009259e-4 days <br />0.00722 hours <br />4.298942e-5 weeks <br />9.893e-6 months <br /> after placing the mode switch in run.

b.

This differential may be de-creased to less than 1.0 psid 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to placing ode switch in refuel or shut-down.

c.

This differential may be decreased to less than 1.0 psid for a maximum of four (4) hours during required operability testing of the e

HPCI system pump, the RCIC system pump and the drywell-pressure suppression chamber vacuum breakers.

2.

If the differential pressure of specification 3.7.E.1 cannot be maintained, and the differential pressure cannot be restored within the subsequent six (6) hour period, an orderly shutdown shall be initi-ated and the ceactor shall be in Hot Standby in six (6) hours and in a Cold Shutdown condition within the following 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />.

3.

The specifications of 3.7.E.1 and 3.7.E.2 are not applicable during a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> continuous period between the dates of March 22, 1982 and March 25, 1982.

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