ML20096E630
| ML20096E630 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 05/11/1992 |
| From: | Maxwell D GENERAL ELECTRIC CO. |
| To: | Eric Lee, Poslusny C, Stewart J NRC |
| References | |
| GL-80-35, NUDOCS 9205190280 | |
| Download: ML20096E630 (5) | |
Text
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'P l'd GENackwEnergy ABWR Date ~ s /u /92 ERiC tGE To ais sTewaaT Fax No. _ -
CHET P o s t.oS N'[f[/ 3 This page plus 3 _ page(s)
From G. D M A x w s L t.
Mali cooe 175 Curtner Avenue -
San Jose, CA 95125 Phone (408) 925 3 Z.0 6-FAX (408) 925-1193 or (408) 925-1687 9
Subject G e w so-sc. u sT re.a nona :
2 Message J M STGW ART R GGi_M ST G D b M R. V r o xm
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920S190280 920511 PDR TOPRP EMVGENE C
PDR-
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,i m 'll ' 3[ 02: 32F11 G C I DlUA EL(4 J P.O 4 V3 st.vedO4 7. wp a Generic Letter 800 D DC Power Supplies QVeltion_1 What valves are powered by a D.C.
power supply?
Response
See Tist accached 9Mfis12LL llow do they fail? (fati open, fail close, or fail an in) 8022112A o
DC powered motor operated valves fail as is.
Air operated valves with UC powered solenoids fail as indicated on the P&lDs.
91 u %LQD 1 Mas CE performed elfcces of D.C.-power supply failure on ECCS performance analysis?
BM Den 9t Yes, loss of DC has been included.
Since all switchgear broskers er.d all multiplexed controi circuits are dependent on DC for operation, loss of DC results in t.be complete loss of the ability of the safety division to function.
It makes no difference whether the power to the final element is DC or AC.
For this reason, loss of DC has been included as a possible failure mode in all probability studies involving tha loss of power.
Que a t Lon_LA 3
L'h a t injection systems are available to inject water into the vessel when a D.
C. pcwor supply is failed?
(wocst case small lOCA and worst case large' 1DCA)
Bjtsponse The systems remaining following the loss of DC for a division would be the same as those shown in SSAR Table 6.3 3 for the loss of the diesel gennrators except that RCIC would also be lost as compared to the systems remaining for the loss of diesel generator A.
Tabulating for loss of DC:
6_ssumed failure Systems Re d ing Division A DC All ADS. 2 HPCF, 2 RitR/LPFL e
Division B or C DC All ADS, RCIC, 1 HFCT, 2 RHR/LPFL
IFe. 'll 'M O2131F11 G C la)1Cif ELN J
'P,3 l 2/3 Since the injection cupacity of the RCIC la less than for one division of the HPCF, the lieniting case is loss of division B or C DC This limiting case is equivalent to the loss of diesel generator B or C as listed in Table 6,3 3, which was the most limiting case for the analyset in the SSAP section 6.3.3.
Therefore, the LOCA analysis as summarized in Table 6.3 4 is completely applicable to the worst case of loss of DC power to divisions a or C for all classes of breaks.
QWs EloD 3.B is that enough.to keep the peak cladding teniperature within the safety limit?
Et.R.21 ult
'l e t., as indicated in Table 6.3 4, the peak cled temperatures (PCT) are well below the 2200 degree P PCT limit.
e A
, itW 11 *N O.D 32Pt1 G E NXLCW U.M J Pdd s
A:Cachent 1 DC M010R OPEPRED VAINES AAITR 1813 E$1 f001 1
8200 6.1 0.4
- ) GAlt VAtys (Cs!)
MEM3/4 h/A 4
DCacc At 1614 (31 7004 1
12300 4.0 A.5 Mc GAft VALVI (luJ) 71Kt843/4 h/A 4
DLMcC A1 1615 151 7005 i
12300 3.2 A.6 A0 Catcr Valvt 795ED&3/4 W/A 40 DC A1 1616 (31 f006 1
70$0 5.8 C.3 Mo Calf VALVT (PSUCT) M 1M3/4 N/A 4
DCMCC Al 1417 E51 r006 1-
+8200 6.0 C.5 Mo GLtst VALVW (TEST) m tsa3/4 w/A 5
Ocucc A1 1618 ESt shM i
8200 6.0 C.5 so Gtont VAtyt (itst) MCM3/4 W/A DCM;C A1 1619 151 f011 1
8200 6.3 C.6 MO QLOSC VALVE (M1~.fl0)795(M3/4 W/A 4-SCMCC A1 "d*_
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1621 (51 PC26 1
12300 3.2 A.6 AC CLDEE 7 ALVI 7954M3/4 m/A 40 gC at 1622 C51 7031 1
2200 6.3 C.6 no Otoet VALV1
?95tAtJ/6 N/A N/A OC A1 '
1623 (31 F032 1
3200 6.3 C.6 40 Ct004 VaLVt -
795E8El/4 W/A
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u,
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1625 (3170M 2
16450 6.-0 C.8 m3 CAff VAlvt (si ste) Iv5tt45/4 N/A 7
DCMCC 21 1626 D1 F037 1
8290 6.0 C.$
M0 C100( VALv1 (Si 1.J9)7Y)L883/4 N/A 4
DCwCC At 162T 451 8039 1
5500 5.7 v.9 No GAtt VAtvE (si ps) 795EM3/4 w/A 7
otMtc A1 162a 231 FM0 1
8200 6.1 C.4 47 GLOSE VALVE 795(843/4 N/A (C
OC 41 16M E51 fS41 1
8200 6.2 C.4 A0 CLOSE VALYt 7954653/4 m/A n/A oC At 1630 E51 704) 1 tL790 6.c c,5 Mo CLCet vu,Vt (51stP) m t6a3/4 N/A 4.
OCMC; A1 1631 s51 FC.T 1
1200 5.9 t.6 M0 CAff VA(V( (W0lsC) MIM3/4 N/A 7
QCMC4 A1
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4 u
1633 E51 F058 1
+8?00 6,2 C.4 40 otCat VALyt 7V5(M3/4 W/A 60 DC Al-r 1634 t$1 7990' 1
+ 87)0 6.0 C.i
'* Tv1Ru(WG VAlvt (NO)
TV5(M3/4 N/A N/A N/A 163$ t31 f999' 1
82C0 6.0 c.$
late & inact VALvt 7MEM3/4 m/A w/A DCMCC A1
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