ML20024B546
| ML20024B546 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/08/1979 |
| From: | Cartin L, Newton D BABCOCK & WILCOX CO. |
| To: | Fairburn G BABCOCK & WILCOX CO. |
| References | |
| TASK-01, TASK-02, TASK-07, TASK-1, TASK-2, TASK-7, TASK-GB GPU-0297, GPU-297, NUDOCS 8307090107 | |
| Download: ML20024B546 (4) | |
Text
-.
t s-N 6.
I
?P.E. EAECCCi. & WILCOX C0" PANT
'l[r ch h,
FC EK GENEEATICS GFO'JP OV Lc*elle l
R3 Cavis f
l En cann I / *-
U: '
f'o G. T. FAIREUF.*i, t.U;LE AR SE7.VICE I
- s 4.r.:
l Frcs D. G. ';Ivic;/L. R. 02 KTIM j
- t I**
l
' ii I'.cf.
or 8 15 c
C'e s t.
3 rJ :PETATl?;*. 7. 0CE;U E t
8 April 8, 1973 C330 l
2 ate Sut]*
CPERATl'43 ItoSTRUCTic*.5 FOR STUCK.0?EN FORV i
g...w..........................i.
t
.45 FOR ISCLATIC: OF A STutK CPE! ?CTJER-1 PER YCUR REQUEST, CPE?ATl!;G !!;5TRUCTl0:
PLEASE REVIEV rid TRA!; SMIT I
07EPATE0 RELIEF VALVE (PCRV) HAVE 3Effi PREFARED.
t A!CES TO l
TriESE tr.5TRUCTI !;5 TO 3r.' 0:ERATl!;; PLAIT CUSTO..!RS AS CA';;lDATE CP !
f TF.ElR OPEFATI!;G/ EMERGE!;CY PROCEcuRES.
i I
4
?
l O
l g f / g # f,.,io
[
f,y-//3.3,o,ny, ee l
l l
l l
l 0
r 8307090107 790408PDRADOCK05000g9
/
P e
w h
l
y.,
... - _.. - _. _ ~
n I
t i.
i'at::. :Ti e'i h#
?
I ITEM 3 QF l.E. Ee.LETis t.:. E--:5 7.E;'.:ESTS 0:lLITIIs VITH EcV-SuppliE3 N55
}
SYSTE*.5 TO 7.IVI EV THE ACTl '45 F I;UI RED FCR C;.*l'.0 '.'ITH T;P.5I E*;TS.
Tal 5 I E b
Bl LLETl?i VAS !!isTIC1.TED SY THE !.*.* CLEAR l'iCICI'sT AT Tv.REE r.lLE 15LA's3. OL 8.l!!:
l~
l f
THIS INCL:EfiT TME POWER-;PE?>T!3 RELIEF VALVE (P:01) C's 7-iE FRE55URL EK CFE'sE3 A';3 FAILE3 TO RECLOSE.
CO*.510 ERA 5LE Tir.E PASSED EITCRE THE C7E?ATOR CETEFaltiE3 THAT THE P0;V HAD FAILED CSE!i A*.3 TC:K CORRECTIVE A;YlCri 70 150 TATE THE VALVE.
C7ERATl*;G PRC E;URES 5800L3 3E ?.EVISED TO Mlillr.!!! THE FOTE?iTIAL FOR A SIMILAR i
EVE?iT. TO SUPPORT THIS EFFORT. liiFORrATIC:4 RELATIVE TO CORRECTIVE ACTI0ri FOR A l
STUCK-CPE*1 PORV 15 PROVICED SELOV FCA YCUR C 's510E?ATIC*i.
'1 2.
D ES I C'1 FL";CT I C*i C F TH E PO RV OVERPRESSURE PROTECTl;!10F THE ACS IS PROVICE3 SY 7.'O CCCE SAFETY VALVES O!! THE PRE 55URIZER. THE ASME C0 E RE;UIRES THAT THESE vat.VES CA?.NOT SE ISCLATED.
PRUDE!4T OPEPATICN OF THESE VALVES DICTATES A MIrilPAL :40M5ER CF TIMES THE CODE SAFETY VALVES VILL SE OPE!;ED. THIS IS ACCor.?LISHED SY PROVl3!!iG A PCRV VITH A LOVER OPENitic SETPOINT.
1hE PORV KEEPS THE RC PRESSURE BELOV THE HIGH RC PRESSURE REACTOR TRIP SETPOINT j
f VHEN AUTOPATICALLY DECREASING TURSINE CE!iERATOR LCAD TO FLANT LOAD FOLLOVING CVERHEATING/CVERPRE55URIZATICfl EVENTS.
[
3 SYMPTOMS OF A STUCK-OPEN PORV 1.
DECREASING RC PRES 5URE VITH
- a. PRESSURIZER LEVEL INCREA51ric OR lticlCATED HICH.
[
- b. STABLE OR ltiCREA51:iG RC TEMPERATURE.
j INCREASE IN THE RC DRAIN TANK LEVEL. PRESSURE. AND/OR TEMPERATURE.
g[
2.
.f e
O
.g.
l ***
.4 i
,O,!,
fe.
C'.'! 8 3 :I!!U: l '
- T I O*. EV E':T5 THAT titiT t "TE FC#V CPERATIC*4 15' Q
(3\\
TrtE EVE:iTS TASL1ATED EELCV COULD POSSISLY RESULT tri RC PRE 55UF.E Rd l
I i
jO t
i PRE 55URIZER PORV.
EN.ER0El:CY 77,0CEOURE REVIE.'5/U? CATES SHOULO THUS CC::5IDER i
THESE EVE!;TS, AT A Mi'itPUM, TO REqulRE CO:.RECTIVE ACTI;M EY THE CPE?ATOR TO t
DETECT A';3 ISCLAT'E A STUCK-OPE:1 PORV.
TUR81:iE TRIP LOSS OF ratti FEE"JATER FEEDVATER LlHE SREAK 1"
LOSS OF EXTERNAL LOAD ROD EJECTION /JITHORAVAL LOSS OF 0FFSITE PC'4ER McCERATOR DILUTION INADVERTEtlT CPERATION OF ECCS LOSS OF REACTOR COOLANT PUMPS LOSS OF CONDE!a5ER VACUUM INADVERTENT CLOSURE OF M51V OVERHEAT TRAt;SlE:;7 KESULTING IN SECOiDARY SYSTEM MALFUf.CTIONS 5
OPERATOR ACTION IF THE PORV FAILS OPEN THE VALVE SHOULD BE ISOLATED BY CLO51NC THE MOT 0k-OPERATED ISOLATION VALVE VHENEVER THE PORV FAILS OPEN.
THE OPERATOR SHOULD ALVAYS KEEP IN MIND THAT THE PORV PROVIDES NO SAFETY FUNC-T10N AND THEREFORE CAN 8E 150 LATED AT A 4Y TIME WITHOUT JEOPARDIZlHC THE SAFETY i
0F THE PLANT.
j THE PORV PROVIDES PLA!4T RELIABILITY. THE PLANT 15 SAFE IF THE PORV FAILS OPEN J
OR CLOSED OR IF THE CODE SAFETY VALVES Fall OPEN (1.E., THE RESULTING SHALL t
LOCA 15 VITHIN THE DESIGN BASIS OF THE ECCS).
O i
2-
~
N wp--
=~==w= e a esenumsprog +=-eme _, __,
w_
e e.=
e a
s.
s.
~
N' i
i D. *'
1
(
6.
C: I TI:.t a FOR v!:.;70R ACT't 0's v
M.
1.
IF TriE :.C PRE 55' RE ll4CP.E ASES 70 TME 7 KV SETPC!NT A'.0 THEN l.
J d
"REASES 3ELC'.i 2000 P510 THE PC?.'.* SHOL*.0 SE CLCSED.
f --
2.
IF TME 7.C P? ESSURE DEC:,EA!!S TO THE HPI ACTUATICf; P:.E55URE, THE PORV SHOUL3 SE CLCSED. ( A'JTC.GTI O! CF THis ISCLAT CN FU!iCTION SHOULD SE C0:;51 CERED.)
NOTE: THE PORV POSITICil INDICATOR LICHTS 00 lici PRCVICE DIRECT STATUS OF THE VALVE POSITICN. THE LICHT I?iclCATES THE POSITICN OF THE 50LE!iO10 CPERATCR CN THE PORV. TH ERE-FORE, THE INDICATCA LIGMTS MICHT t:07 IriDICATE A STUCK-OPEN PORV.
I j*
. i r
O
.; g, h.:qnylGi;}
- ~ ~
A,?.-
D l.
V
/
4/
I S'
I 1
I i
r
(
l
~
--<,3
, ;.m
- 7... - -
I p
saw am e
-teee
,,