ML20003F500
| ML20003F500 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 04/15/1981 |
| From: | MISSISSIPPI POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20003F494 | List:
|
| References | |
| 05-S-01-EP-8, 5-S-1-EP-8, NUDOCS 8104210418 | |
| Download: ML20003F500 (5) | |
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.c - O.1 r.. - 2 Secticn
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, L.w or ALTEPl; ATE SHUTDOWN CCOLI:;d S n-r. r. v.
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The purpose of this procedure is to establish an alternate neans for cooling down the RPV when the PER Shutdown Cooling Mode is not available.
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..s This procedure is entered frc= EP-2 (Cocidewn) when the following o c
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2.1 PRR Shutdown Cccling Mcde canne he established 4
and 2.2 The RPV caa. no 1cnger be eccled down by depressurizatien
_and 2.3 RPV te=cerature must 'ce reduced and/or the PSV =ust be =aintained in a cold sn.utdown cen..1 tion.
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3.1
- nitiate Sureression Pool Cooline (04-1-01-E12-1 step later)
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3.2 Cicse the fellcwine if open:
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3.2.1 PSV head vents 321-F001 321-F002
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3.2.2 MSIV's
_/7 3.2.3 Main Steam Iine Drains i
_/7 3.3 Open c:Jshut SRV's as necessary such than ene SRV is open.
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3.4 In4ect into the PSV with one of the folicwine c.une.s taking a suction frc= the Suppression PecI
_/7 3.4.1 LPC:
(04-1-01-E12-1 step ister)
/7 3.4.2 I.F CS (04-le01-E21-1 ste later)
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3.5 Slowly increase RPV water level to between
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ficu thrcuch the coen SRV back to the Suppression ecci
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3.5.1 Verifv. ficw throuc,h the.SRV hv. ensurine. SRV tailr.ic.e testerature ec.uaa,l es with RPV temperature.
3PJ.MD GU* F NUC~. EAR STATICN EMERGENCY PROCECCPI
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Alterna*:e Shutdown Cooling
_/7 3.5.2 If no flow is indicated through the SRV, open another SRV.
_/7 3.6 Slewly increase the unning pu p flow to the maximum allowable for the stable PSV pressure (L?CI-Figure A 'or LPCI - Figure 3) ps]
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9pm SP m LFCl LPCs FIGUP2 A FIGURE 3
_/7 3.6.1 If RP'T cressure does not stabili::e above (Later) e. s i c_, start a d.cr LPCS or LPCI pump.
/7 3.6.2 If PSV Oressure does not stabilize below (Later) psi, open v
another SRV.
_/ 7 3.7 Monitor Supp esrion Pool leve1
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A steady SRV tailpipe tem-rature with a varying RPV te=perature accompanied by a decreasing Suppression Pool level is indicative of an SRV line break in the Drywell.
L7 - 3. 7.1 If Suppression Pool level is constant, alternate Shutdown Cooling has been established.
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_/7 3.7.2 If Su=eression Pool level is decreasing l
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Verify proper flow through the SRV by ensuring SRV tailpipe temperature equals PSV temperatur i
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If temperatures are not equal, open another SRV
- b. Ver.fy the cperati.g injecticn systet (LPCS a~J./or IPII) is li afup properly for injectica into the vessel.
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3.8 If the cooldown rate exceeds 100 F/hr, reduce LPCS and LPCI injection l
flowrate into the RPV until the cocidown rate decreases to less than i
100 F/hr.
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O 3.10 Proceed to cold shutdown in acedrdance with IOI-03-1-01-3.
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