ML20009D185

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Containment Control Emergency Procedure.
ML20009D185
Person / Time
Site: Shoreham File:Long Island Lighting Company icon.png
Issue date: 07/10/1981
From:
LONG ISLAND LIGHTING CO.
To:
Shared Package
ML20009D181 List:
References
29.023.03-DRFT, NUDOCS 8107230262
Download: ML20009D185 (12)
v • d • e


Text

Submittcd t SP Numbar 29.023.03 (Section hard)

App oved. Revision: C (Plant Manager)

Effective Date CONTAINMENT CONTROL EMERCENCY PROCEDURE i I+.bi a

1.0 PURPOSE The purpose of this procedure is to control primary containmest temperatures, pressure and level. This procedure will be performed concurrently with the procedure from which it was entered.

2.0 ENTRY CONDITIONS The entry conditions for this procedure are any of the following:

Paragraph 2.1 Suppression Pool Temperature Above 90*F 3.1 2.2 Drywell Temperature Above 135*F -3.2 2.3 Drywell Pressure Above 1.69 psig 3.3 2.4 Suppression Pool Level Above 26' 8" 3.4 2.5 Suppression Pool Level Below 26' 0" 3.4 NOTE Enter the paragraphs of this procedure as required by the entry condition. The paragraphs can and should be performed concurrently with each other as the entry conditions dictate.

3.0 OPERATOR ACTIONS 3.1 Monitor and control suppression pool temperature.

3.1.1 Attempt to close any stuck open SRV per SP23.116.01.

CAUTION If continuous LPCI is required to assure adequate core cooling, do not divert RRR pumps from the LPCI mode.

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3.1.2- Operato cvailabli cupproscion pool cocling par

'SP 23.121.91 wh:n cupressien pool tetpsratura exceeds 90'F.

3.1.3 If suppression-pool temperature reaches 110*F, scram the reactor per SP 29 919 91, Emergency Shutdown.

CAUTION Cooldown rates above'199'F/HR may be required to accomplish this step.

CAUTION Do not depressurize the RPV below 100 psig (HPCI low pressure isolation setpoint) unless motor driven pumps

- sufficient to maintain RPV water level are running and available for injection.

CAUTION Observe NPSH requirements. for pumps taking a suction from the suppression pool.

1 SUPPRESSION POOL PUMPS MAXIMUM TEMPERATURE MINIMUM LEVEL HPCI (Later) (Later)

RHR (Later) (Later)

CS (Later) (Later)

RCIC- (Later) (Later) i 3.1.4- If suppression pool temperature cannot be maintained below the heat capacity temperature limit, maintain RPV pressure below the limit of Figure 1.

3.1.5 If suppression pool temperature and RPV pressure cannot be restored or maintained below the heat capacity temperature limit, proceed to SP29.023.05 (Rapid RPV Depressurization).

i SP 29.023.03 Rev. C

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3.2 Monitor cnd control drywell tamparcture.

3.2.1- Operate available drywell cooling when drywell temperature exceeds 135*F.

CAUTION DO NOT DIVERT RHR PUMPS FROM THE LPCI HDDE UNLESS ADEQUATE C0RE COOLING IS ASSURED.

o. 1 -3.2.2 If DRYWELL TEMPERATURE approaches 296*F,

' SHUTDOWN the Reactor Recirculation Pumps and Drywell Fans and initiate Drywell Sprays CAUTION Do not depressurize the RPV below 199 psig unless motor driven pumps suf ficient to maintain RPV water level are rr.nning and available for injection.

CAUTION Cooldown rates above 199"F/HR may be required to

' accomplish this step.

3.2'.3' - If DRYWELL TEMPERATURE reaches the RPV Saturation Limit, 71gure 2, enter SP29 923 95 (Rapid RPV Depressurization).

3.2.4 . If drywell temperature cannot be maintained below 296*F, proceed to SP23.023.05 (Rapid RPV Depressurization).

3.3 MONITOR AND CONTROL primary containment pressure with the following systems as required:

3.3.1 IF PRIMARY CONTAINMENT PRESSURE REACHES 1.69 psig Tperate THE POST LOCA HYDROGEN RECOMBINATION SYSTEM per SP23.402.01.

3.3.2 Operate the.MSIV Leakage Control System per SP23.496 91.

' CAUTION ELEVATED SUPPRESSION CHAMBER PRESSURE HAY TRIP THE RCIC

. TURBINE ON HICH EXHAUST PRESSURE, 25 psig.

SP 29.023.03 Rev. C

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3.3.3 VENT th2 primary centninment through tha RBSVS systen per SP23.418 91 only when the drywell temperature is below 212*F. ' ENSURE Rad / Chem samples and analyzes primary containment atmosphere prior to venting.

CAUTION DO NOT DIVERT RHR PUMPS FROM THE LPCI HODE UNLESS ADEQUATE CORE COOLING IS ASSURED.

3.3.4 INITIATE suppression pool sprays before the Suppression Chamb:r pressure reaches the suppression pool spray ,

limit, Fig. 3.

3.3.5 If Suppr'ession Chamber pressure approaches the Pressure Suppression Limit, Fig. 4 SHUTDOWN the Reactor Recirculation Pumps and the Drywell Fans and INITIATE Drywell Sprays as necessary to maintain Suppression Chamber pressure below the curve.

3.3.6 If Suppression Chamber pressure cannot be maintained below the presure suppression limit Fig. 4, ENTER SP 29.923 95 (Rapid RPV Depressurization).

9.4 . MONITOR and CONTROL suppression pool water level 3.4.1 MAINTAIN suppression pool water level between 26'9" and 26'8". ENSURE Rad / Chem samples and analyzes suppression pool water prior to lowering of Suppression Pool Level.

CAUTION Do not depressurize the RPV below 199 psig unless motor driven pumps sufficient to maintain RPV water level are l

runnning and available for injection.

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i I CAUTION Cooldown rates above 199'F/HR may be required to accomplish the following steps.

P S? 29.023.03 Rev. C

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3.4.2 If.cupprocsien' pool w: tee 1sval is lara than 26'9" and isval ccn be maintain;d abova tha heat cep: city laval limit, Fig. 5, initiate suppressioa pool makeup per SP (later).

3.4.3 If suppression pool cannot be maintained above the heat capacity level limit, Fig. 5, proceed to SP 29.923 95 (Rapid RPV Depressurization).

CAUTION.

If_ high suppression pool level (26'8") exists or' low condensate storage tant level (3'4") exists, VERIFY / MANUALLY transfer RCIC and HPCI suctions from the CST tank to the Suppression pool.

3.4.4 IJ[ the Suppression Pool water level is above 26'8" and adequate core cooling is assured, TERMINATE injection

-into'the reactor vessel from sources external to the primary containment.

3.4.5' If suppression pool water level cannot be maintained below the suppression pool load limit, maintain RPV pressure below the limit' of Figure 6.

CAUTION

" > Observe NPSH requirements for pumps taking a suction fr m the Suppression Fool.

, SUPriESSION POOL PUMPS MAXIMUM TEMPERATURE MINIMUM LEVEL

[ HFCI (Later) (Later)

CS (Later) (Later)

RHR (Later) (Later)

RCIC (Later) (Later)

!. 3.4.6 ~ If suppression pool water level and RPV pressure cannot be restored or maintained below the suppression pool load limit, proceed to SP 29 923.95, rapid RPV l _

depressurization.

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3.4.7 Whsn primary centninment watar 1sval rsschas intsr isst terminate injection into the RPV from sources external to the primary containment irrespective of whether adequate core cooling is assured.

49 REFERENCES 4.1 SP 23.116 91 Main and Auxiliary Steam 4.2 SP 23.121.91 Residual Heat Removal (RHR) System 4.3 SP 29 919 91 Emergency Shutdown 4.4. SP 29.923 95 Rapid RPV Depressurization 4.5 SP 23.492 91 Primary Containment Post LOCA Hydrogen Recombination 4.6 SP 23.418.91 HVAC Reactor Building f .

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