ML20045G716

Forwards Ssar Markups of Emergency Procedure Guidelines, Incorporating ATWS Stability Strategy (Issue 12),per NRC Request During 930610 Mgt Meeting

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 l

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. ABWR - 2346iconR ' .1 Standard Plant REV.A pc/q-6 E<W er: l

, 4)),e p e r,o die n e *< fro n //ux sad /k Hon.s i% e a e s.s ]

( s 5 % ( 4 a ry e 05es //< Hor 7'h "'c hold)2 Pea k- o -/N a i<

Lomm e ne c an d con Nne e., p p  :

_- 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. ,

c.f .1 ff p ~ MS 4 3 h 0$ iSDl4 lecl, b /* J RPV kukr /e ve /

in./e,kx., +o naabin de ~yf5 /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., l m

46.5  :

y 46.39 - <

E 46.0 i

w

[ 45.5 9

45.0 44.5

c. 1 h 44.0 -

12 E 43.5 ia43.33 - -

• 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)],

1 1

I ABWR C5-2 i l

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 l 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 m' W:: Ja Rf"/ n= !n e' ea" G w #7 ik c

gl }0C d If RPV water level was deliberately lowered in [ Step C5 },te'" = r (o v .

47" ! en 'Minimium Sichm Cce!Sg P P" "'ver Lt.sgl)J}.and the lev ig Vi

1. which it was lowered, or gg-/

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 Amendment 24 IIA I20

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:

Terminate and prevent all injection into the RPV except from boron C5[1 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 Amendmem 22 18A.12 5

1 ABWR ursimia Standard Plant anv. 4 :

Commence and, irrespective of pump NPSH and C5f.2 vortex liraits, slowly increase injection into the RPV sr #7

[ with the following systems to restore and maintain RPV ea d ": Sd)h waterlevel C11,y-above e {0 cm d(&bm 54em Cool.kj @

Condensate /feedwater Qater Lesel )]*,

a CRD

+ 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'gr- -

r -- -

e

. ABWR 2x6imia Standard Plant asv. 4 (C5-4 Deleted - not applicable to ABWR)

C5- hen [ procedure for cooldown to cold shutdown conditions] is entered from

[ W{ procedure developed from the RPV Control Guideline) at [ S proceed to cold shutdown in accordance with [ procedure for cooldown to cold shutdown conditions).

ABWR. C5-7 Amendment 22 IBA.12 7 I

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