ML19326A799
| ML19326A799 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 08/12/1975 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Rodgers J FLORIDA POWER CORP. |
| References | |
| NUDOCS 8003040757 | |
| Download: ML19326A799 (4) | |
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'70 cre ;rcrcatly rcvictin ; the I.CCS contain~1nt prccrure cniculctiona provided in F r.. -10103, ' ECCS L".luation of IUJ 177 FA Lowered Loop ::SS",
. :ich you have refercnced for the Crystal River, l' nit 3 ECCS cyclustion.
e find thct the centainrunt input parnr.etcrs selected for use in
' ' 20103 invc not been justified cc being concarvr.tive for the ECCS cm.tri -- ont preccere cciculntien for Cryctal ilver, Unit 3.
Pursunut to cp mdi:: i, 10 CFR 50, justification rest be provided for pasnive t r ide nnd other cignificcnt containment pcre.naters.
o requc^t justificatica be previ?cd by conpr. ring the input parcr.eters uced in Ct17-10103 uith the cppropriate vclum for Crystal River, Unit 3.
Mic-1 inforrstion required for justifyin', these pcra:.eters is prs.1Idcd in the (nclosure to thic lettar.
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REQi1 CST TCR ADDITIO', Al IITOPRATION-CRYSTAL - RIER, UNIT _3_.
DOCIST No. 50-3C__2_'
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"De ECCS analysis for your' plant id reference ' to E!N-10103.
Provide justification for the.following input paraceters used in E!di-10103 by conparison with the appropriate values for your. plcnt.
Net Free Containednt Volt =e - Justification should include the total 1.
grosa internal contai[rcent voluna and the internal structures and equip-
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rent and their: voltaes uhich nic subtracted to ob'tain the net frea contairment voluse.
A disct ssion of the tacertainties should be pro-vided.
Passive Heat Sinis_ -- Provide the actual passive heat sink structures for 2.
your plant.
Discuss the nethod of deterining the passive containment heat sinks.
Identify each heat sink by category (i.e., cabic tray, equipment supports, floor grating, crane vall, etc.) and provide surf ace thickness, natcrials of const'ruction, thermal conductivity and
- area, voltactric heat capacity, by conponent category used in' the containnent transient analysis code.
Starting Tine of Centaincent Cooling Systcr(s)
-Discuss the factors 3.
thEt show that the start tine (s) assuned in the containment response analysis represcat the earliest possible initiation 'of systen(s) operation.
Initial Conditions - Compare the initial values.of tenperature, 4.
Containment f values
,, pressure t.nd relative hunidity in the containment with the range o that will b'c permitted duriiij' plant operation.
i Containcent Spray Unter Tenparaturc - Shcw that t he value of containment 5.
'sprayJunter t,ceperature used in the -ccatainment response analysis is the lower bound tc=perature, consistent tith plant operating conditions and -
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- t. hat the spr: y flow rate uned is cuitably conservative.
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~': n-Cool et-E 2t Er:coval Ente
'Coripare the na::Inum f an-cooler heat renoval rate for Crystal River," Unit 3 with that asst ned in EAU-10103.
Show that ninieun operaticnal valuss of service water tecparatura have Loca used.
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If. any o[ the above paraceters are less conservative for your plant than t'32d in the n:ne:1c evaluation of 3N.!-10103, provide the sensitivity of these paraueters to the overall contain22nt pressure response. This evaluation should deconstrate the overall conservatism of your containcent paranatccs to those used in EAU-10103.
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