ML061140265

Technical Specification Pages Re Revised Applicability for Containment Oxygen and Differential Pressure Limits

ML061140265
Person / Time
Site:	Pilgrim
Issue date:	04/10/2006
From:	Office of Nuclear Reactor Regulation
To:
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Download: ML061140265 (5)

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LIMTl-ING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.7. !ONTAINMENT SYSTEMS (CONT) 4.7 CONTAINMENT SYSTEMS (Cont)

A. Primary Containment (Cont) A. Primary Containment (Cont)

e. In order to continue reactor power d. Whenever there is indication of relief operation, the suppression chamber valve operation with the local pool bulk temperature must be temperature of the suppression pool reduced to <8b0 F within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. T-quencher reaching 2000 F or more, an external visual examination of the

f. If the suppression pool bulk suppression chamber shall be temperature exceeds the limits of conducted before resuming power Specification 3.7.A.1.d, RCIC, HPCI operation.

or ADS testing shall be terminated and suppression pool cooling shall e. A visual inspection of the suppression be initiated. chamber interior, including water line regions, shall be made at each major

g. If the suppression pool bulk refueling outage.

temperature during reactor power operation exceeds 11 O0 F, the f. (Deleted) reactor shall be scrammed.

g. Suppression chamber water level

h. During reactor isolation conditions, shall be recorded at least once each the reactor pressure vessel shall be shift when the differential pressure is depressurized to less than 200 psig required.

at normal cool down rates if the pool bulk temperature reaches 120'F.

I i. (Deleted)

I j. (Deleted)

Amendment No. 4-S. 21' 4.

3/4.7-2

LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.7 COIJTAINMENT SYSTEMS (CONT) 4.7 CONTAINMENT SYSTEMS (Cont)

A. Primary Containment (Cont)

k. (Deleted)

I. (Deleted) mn.Suppression chamber water level shall be between -6 to -1 inches on torus level instrument which corresponds to a downcomer submergence of 3 feet to 3 feet 5 inches.

n. The suppression chamber can be drained if the conditions as specified in Section 3.5.F.5 of this Technical Specification are adhered to.

Amendment No. 17, 113, 163, 200,218 314.7-3

LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.7 CONTAINMENT SYSTEMS (Cont) 4.7 CONTAINMENT SYSTEMS (Cont)

A. Primary Containment (Cont) A. Primary Containment (Cont)

d. If a failure of one of the two installed position alarm systems occurs for one or more vacuum breakers, reactor operation may continue provided that a differential pressure decay rate test is initiated immediately and performed every 15 days thereafter until the failure is corrected. The test shall meet the requirements of Specification 3.7.A.4.b.

5. If the specifications of 3.7.A.1 thru 3.7.A.4 cannot be met, an orderly shutdown shall be initiated and the reactor shall be in Cold Shutdown condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

I 6. Oxygen Concentration 6. Oxygen Concentration I

a. The primary containment The primary containment o)ygen atmosphere shall be reduced to concentration shall be measured and less than 4% oxygen by volume recorded at least twice weekly with nitrogen gas while in RUN MODE during the time period:

i. From 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after thermal power is greater than 15%

rated thermal power following startup, to ii. 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to reducing thermal power to less than 15% rated thermal power prior to the next scheduled shutdown, except as specified in 3.7.A.6.b.

b. If the specifications of 3.7.A.6.a above cannot be met, and the primary containment oxygen concentration cannot be restored to less than 4% oxygen by volume within the subsequent 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period, reactor thermal power shall be less than 15%

rated thermal power within the next 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

Amendment No. 87,-1-^ , 218 314.7-9

LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.7 CONTAINMENT SYSTEMS (Cont) 4.7 CONTAINMENT SYSTEMS (Cont)

A. Primary Containment (Cont) A. Primary Containment (Cont)

7. Containment AtmosDhere Dilution 7. Containment Atmosohere Dilution

a. Within the 24-hour period after a. The post-LOCA containment placing the reactor in the Run Mode atmosphere dilution system shall be the Post - LOCA Containment functionally tested once per operating Atmosphere Dilution System must cycle.

be operable and capable of supplying nitrogen to the containment for atmosphere dilution. If this specification cannot be met, the system must be restored to an operable condition within 30 days or the reactor must be at least in Hot Shutdown within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

b. Within the 24-hour period after b. The level in the liquid N2 storage tank placing the reactor in the Run shall be recorded weekly.

Mode, the Nitrogen Storage Tank

c. Not used.

shall contain a minimum of 1500 gallons of liquid N2. If this d. Once per month each manual or specification cannot be met the power operated valve in the CAD minimum volume will be restored system flow path not locked, sealed within 30 days or the reactor must or otherwise secured in position shall be in at least Hot Shutdown within be observed and recorded to be in its 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. correct position.

8. Drvwell and Suopression Chamber 8. Drywell and Sumroression Chamber Differential Pressure Differential Pressure

a. Differential pressure between the a. The pressure differential between drywell and suppression chamber the drywell and suppression shall be maintained at equal to or chamber shall be recorded at least greater than 1.17 psid, while in once each shift when the differential RUN MODE during the time period: pressure is required.

i. From 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after thermal power is greater than 15%

rated thermal power following startup, to ii. 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to reducing thermal power to less than 15% rated thermal power prior to the next scheduled shutdown, except as specified in 3.7.A.8.b and c.

Amendment No. 5, 206, 218 3/4.7-1 0

LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.7 CONTAINMENT SYSTEMS (Cont) 4.7 CONTAINMENT SYSTEMS (Cont)

A. Primary Containment (Cont) A. Primary Containment (Cont) to. The differential pressure may be reduced to less than 1.17 psid for a maximum of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> for maintenance activities on the differential pressure control system and during required operability testing of the HPCI system, the relief valves, the RCIC system and the drywell-suppression chamber vacuum breakers.

c. If the specifications of 3.7.A.8.a and b above cannot be met, and the differential pressure cannot be restored within the subsequent 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period, reactor thermal power shall be less than 15% rated thermal power within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

Amendmeit No. 65, 206, 21 /

3/4.7-1 Oa