ML20045G716
| ML20045G716 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 07/02/1993 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Poslusny C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9307150090 | |
| Download: ML20045G716 (9) | |
Text
. _. _ _
(
GENuclear Energy Gene:s Electnc Ccm;>any 1/5 Conw Avenue. Sc Jose. CA 9$125 July 2,1993 Docket No. STN 52-001 Chet Poslusny, Senior Project Manager St mdardization Project Directorate Aisociate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation
Subject:
Submittal Supporting Accelerated ABWR Schedule - ATWS Stability EPGs (Issue #12)
Dear Chet:
Enclosed are SSAR markups of the Emergency Procedure Guidelines (EPGs) incorporating the ATWS stability strategy (Issue #12) as requested by the NRC during the June 10,1993 management meeting. This will be included in Amendment 32 scheduled to be transmitted to the NRC on August 31,1993.
Please provide a copy of this transmittal to George Thomas.
Sincerely,
i ack Fox Advanced Reactor Programs ec: Alan Ileard (GE)
Norman Fletcher (DOE)
Cal Tang (GE) 130166 nw2n 1
9307150090 930702 T""
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i ABWR
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.1 Standard Plant REV.A pc/q-6 E<W er:
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_- RC'O 6 s Before suppression pool temperature reaches the[ (Boron Injection Initiation Temperature)] but only if the reactor cannot be shutdown or the control rods are not inserted to or beyond [4.2% (Maximum Subcritical Banked Withdrawal Position)), BORON INJECTION IS REQUIRED: inject boron into the RPV with SLC and prevent automatic initiation of ADS.
BORON INJECTION INITIATION TEMPERATURE 47.0 g
w E
46.5 d
@ 46.39 y
'46.0 B
m 45,5 IF CANNOT SHUTDOWN REACTOR w
45.0 INJECT BORON 44.5 h
44.0 g
N 43.5 E 43.33-2*
43.0 0
1 2
3 4
5 6
7 8
9 10 2.21 2.56 REACTOR POWER (%)
1 If boron cannot be injected with SLC, inject boron into the RPV by one or more of the following alternative methods:
[*
CRD)
[+
HPCF]
[*
RWCU)
[*
Feedwater]
[*
RCIC]
P ABWR RC-14 Amendment 22 IBA 4-14 i
r.
T 2
ABWR uui,
Standard Plant iv.,
ff p ~
MS 4 3 h 0$ iSDl4 lecl, b
/* J RPV kukr /e ve /
in./e,kx., +o naabin de ~yf5 c.f.1
/n w d~ee as e
r h dgb 5EH $.
I C51 Prevent automatic initiation of ADS.
y[If;
~
C5
}
Reactor power is above [5% (APRM downscale trip)] or cannot be determined, and Suppression pool temperature is above the Boron injection Initiation Temperature, and BORON INJECTION INITIATION TEMPERATURE 47.0 9.,
m 46.5 y 46.39 -
E 46.0 iw
[
45.5 9
45.0 44.5 c.
1 h
44.0 12 E
43.5 i 43.33 -
a*
43.0 0
1 2
3 4
5 6
7 8
9 10 2.21 2.56 REACTOR POWER (%)
l Either an SRV is open or opens or drywell pressure is above
[0.12 kg/cm2 g (high drywell pressure scram setpoint)],
ABWR C5-2 8^'
Amen &nent 24 1
ABWR 2mimaa Standard Plant arv. 4 3
C5;f(continued)
Then:
'f 2ny '1S"'. opca, bypur; sw !!!'".;:er '~al m1V i<nintin% ivd3, -
Lower RPV water level, irrespective of any e=cnnon actor power or RPV water level oscillations, by terminating and preventing all injection into the RPV except from boron injection systems and CRD until either:
Reactor power drops below {5% ( APRM downscale trip)), or RPV water level reaches [0 cm (top of active fuel)], or All SRVs remain closed and drywell pressure remains below
[0.12 kg/cm2 g (high drywell pressure scram setpoint)].
ABWR C5-2.1 Amendment 24 IEA 12-2 I N
I,
)
=
ABWR m6ima Standard Plant arv. 4 j
If while executing the following steps Emergency RPV Depressurization is required, continue in this procedure at [ Step C5
.1 ].
If while executing the following step:
Reactor power is above [5% (APRM downscale trip)] or cannot be determined, and e-RPV water level is above [0 cm (top of active fuel)], and Suppression pool temperature is above [the Boron Injection Initiation Temperature], and Either an SRV is open or opens or drywell pressure is above [0.12 kg/cm2 g (high drywell pressure scram setpoint)],
retum to [ Step C5 /].3 y
+
k m'
W:: Ja Rf"/ n= !n e' ea" G
w #7 c
gl
}0C i
47" ! en 'Minimium Sichm Cce!Sg P P" "'ver Lt.sgl)J}.and the le d
If RPV water level was deliberately lowered in [ Step C5
},te'" = r v
(o ig gg-/
Vi which it was lowered, or f
If RPV water level was not deliberately lowered in [ Step C5-/], be'"'ecr m rm onp nr,cra,n rucm Md [474.2 cm (high level trip setpoint)], with the following systems:
- Condensate /feedwater
- CRD
- RCIC with suction from the condensate storage tank, e #3,4 bypassing low RPV pressure and area high temperature isolation interlocks and high suppression pool water level suction transferlogic if necessary.
ABWR C5-3 IIA I20 Amendment 24
r--
ADD THE FOLLOWING STEPS:
C5-4 If RPV water levelis above [154.7(Maximum Power Control RPV Water Level)) and the reactor is not shutdown:
Lower RPV water level to below (154.7 cm(Maximum Power Control RPV Water Level)) by terminating and preventing allinjection into the RPV except from boron injection systems and CRD.
C5-5 Maintain RPV water level between (496e.(Minimum Steam Cooling R=V Rf V Water Level)] and either:
-79,y cr
ABWR 2macua Standard Plant any. A
!r pou ;;;;7 ;;yc;..s set d !!bente!y !c e=ed in !**p CC-2] :nd P_n" w:!m 1 vel cannesc umimaincu obovc [0 c u (ivy of ;;;iv; fu:!)], nieiniain P " -
umter level hetm:;; [ 7^,.', un Gvjuuuuusu Oka. C^^Ung P.P" W2t?! LO !)] -
-2nd [i'".2 en. ( up. Icici iup acy;in0].-
If RPV water level cannot be maintained above [-79.4 cm (Minimum Steam Cooling RPV Water Level)], EMERGENCY RPV DEPRESSURIZATION IS REQUIRED:
C5[1 Terminate and prevent all injection into the RPV except from boron g
injection systems, CRD, :uid RCIC until RPV pressure is below the Minimum Alternate RPV Flooding Pressure.
Number of open SRVs Minimum Alternate RPV Flooding Pressure (kg/cm2 g) 8 or more 9.48 7
10.98 6
12.98 5
15.78 l
4 19.99 3
27.00 2
40.99 1
If less than [2 (minimum number of SRVs for which the Minimum Alternate RPV Flooding Pressure is below the lowest SRV lifting pressure)) SRVs can be opened, continue in this procedure.
i t
i ABWR C5-5 18A.12 5 Amendmem 22
1 ABWR ursimia Standard Plant anv. 4 :
C5f.2 Commence and, irrespective of pump NPSH and vortex liraits, slowly increase injection into the RPV sr #7
[
with the following systems to restore and maintain RPV ea d ": Sd)h waterlevel above {0 cm d(&bm 54em Cool.kj @
C11,y e Condensate /feedwater Qater Lesel )]*,
CRD a
RCIC with suction from the condensate storage pool,
+
defeating low RPV pressure isolation and area high temperature interlocks and high suppression pool water level suction transfer logic if necessary.
RilR (LPCF)
+
Ir npv warreinvri1nnnn,hnrc"e ~4,~<,;;,;;;n;d ag,,[c,,,
t'ep af r:i ; id)], scac : and maintain n n" e-- !cre! nhnyc__
f ~1o A := 0 'onunun. Skau. Cvuluig PJV ',Va;c-Lcvci)]. -
If RPV water level cannot be restored and maintained above
[-79.4 cm (Minimum Steam Cooling RPV Water Level)], commence -
and, irrespective of pump NPSH and vortex limits, slowly increase injection into the RPV with the following systems to restore and maintain RPV water level above [-79.4 cm (Minimum Steam Cooling RPV Water Level)]:
HPCF Fire protection system and firewater addition mode of RHR(C) l
=
ECCS keep-full systems:
HPCF, RHR l
Condensate Makeup Water System If RPV waterlevel cannot be restored and maintained above
[ 79.4 cm (Minimum Steam Cooling RPV Water Level)],
PRIMARY CONTAINMENT FLOODING IS REQUIRED; enter (procedure developed from Contingency #6].
C5.3 When RPV water level can be maintained above [-79.4 cm (Minimum Steam Cooling RPV Water Level)], retum to
[
[ Step C5-3].
ABWR C5-6 p
1 BA.12-6 Amendrnent 24
+
6
'rrn r
r'gr-r si-v m.
m-
e ABWR 2x6imia Standard Plant asv. 4 (C5-4 Deleted - not applicable to ABWR)
[ W{ procedure developed from the RPV Control Guideline) at [ S hen [ procedure for cooldown to cold shutdown conditions] is entered from C5-proceed to cold shutdown in accordance with [ procedure for cooldown to cold shutdown conditions).
ABWR.
C5-7 Amendment 22 IBA.12 7