ML20136C019
| ML20136C019 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/13/1979 |
| From: | Thiesing J INDUSTRY ADVISORY GROUP |
| To: | |
| References | |
| IA-3, NUDOCS 7909130517 | |
| Download: ML20136C019 (5) | |
Text
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a Memo No. I O'3 TASK CLOSE CUT DOCUMENT Task Scope
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M. Levenson S. Levy E. Zebroski Task No.
h Date Complete 4-/ ~5-7_7 Reason felt task is complete:
j I. % Ia n baas h<c deRned 2. G&ud E m adined. 5. ReweA zule-reshms Aehned.
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!n order ta define th-i k e l;. p rag r " 4 i.
af.. eat in the contain.ent l'u ild i n ; in response to a
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rate fil e has be' i pc+ tulat eu nj the ros11:i 4
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ent :esponse ta wh a fire has been quantifiel.
DLI:N ii lN OF simii! ATION !aS IS : fi F lt '.u s as,u u u
- hat *he 43o gallans 0: lu 'rie,* ing :! 1 con t a i n t!d, i n Iu5-si! sy< ten far tao rea t ar coal.u:t pmps ione ;oap' is spi l l ed un.' n: u an
- he f!oer o f
- he etean generator vault 1000 ft.2' rer.iting in an e Ig er o.S inches thici.
i Surn rate af 5.r:nes per hour war useJ, rese!!ir :
in a 6 linute fire.
A heat rate a-0, NO i!!uflba wa s ; sed.
.\\SSU'.!L D 6 PEA \\ TOR /SYSTP! RESPONSE It was asr rt that tli 3 u: coolers inJ Soth snray train wou;J be actuated by the aperator one minut. afte; :gnition in re8 pense to the rapidly rising (superheat) temperature in the contair.iaent.
RESUI.TS The attached figure describes tne pressure and tempernture response of the containment building (assu:aed homogeneous) to the simulation basis fire.
Clearly, the building spray s. stem is effective in suppressing building super-heat and pressure to ae:cptable values.
Given the convective nature of heat transfer to uninvolved equipment it is likely that most con taire:en t equi pr'en t would survive in operable condition.
FIRE SUPPRESSION Given a severe fire which does r.ot co=aunicate with other conbustibles, the resulting pressure / temperature response can be controlled at acceptable tite SEVE levels providedfeurns itself cut without spread in g.
Equipment in the area of the fire would, of course, be !isabled.
It is doubt ful that current!s in.s t a l l ed i
equi p'n en t fprimar'!y building
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l cif i c i ene y, it e in only control the re<uiting temperiture transient.
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lif fvet ive fire suppren ion e.tpability can pm ibly be establisard b:.
installing a high cap teity frcon or other :as eou-cuppres, ant d e l l ', o:
on one of the buildinc, purge penetraticns. Ten solume percent freon.:'uld oc estaolished in ten atnutes witn a.'d,dou en. ;yste1 capable of pump:ng ae 4 : n it,
s.ly, 30 psig.
t'i'f.R ATOR QUh8
\\s can be seen fron: the figure, t he t i p-o f t to exist. tace of i fi 2 'a containment is a rapidly rising superheat temperature in th-building i.e.
rapid temnerature without a commensurate apia pressure rise).
Such a t r:ui :l e:i:
4hould, as a matte: of procedure, call for immediate ope:9to: initiation of builtilng spray:. ai r coolers, and any ins ;alled fi re suppre.-sion systeme
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