ML18082A396
| ML18082A396 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 05/05/1980 |
| From: | Librizzi L Public Service Enterprise Group |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8005150368 | |
| Download: ML18082A396 (4) | |
Text
PS~G e 80051503lo8 Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /430-7000 Ma.y 5, 1980 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. A. Schwencer, Chief Operating Reactors Branch No. 1 Division of Operating Reactors Gentlemen:
AUXILIARY FEEDWATER SYSTEMS SALEM GENERATING STATION UNIT NO. 1 DOCKET NO. 50-272 We have reviewed your letter related to Auxiliary Feedwater Systems at Salem No. 1 dated April 4, 1980.
The foll.owing are our responses to the open items identified in your letter:
- 1.
Recommendation GS-4 The procedure changes requested will be implemented by June 2, 1980.
- 2.
Recommendation GS-6
- a.
The procedure changes requested will be implerrierited by June 2, 1980.
- b.
Use of the AFWS for plant startup is with all.
AFWS valves in their normal alignment and is supplying water from the Auxiliary Feedwater Storage Tank to the steam generators.
- 3.
Recommendation X.12.3.2.1 It is our intent to provide:
- a.
Redundant auxiliary feedwater storage tank level indication and alarms in the control rooms,
- b.
Redundant power supplies and safety grade design for the system.
~~,\\1 r~~"~'
1679 1979 95-2001 (300M) 1-79
i... \\
.,,, '.* 1 Dir. of Nuc. Reac. Regulation s-s;:.;.ao
- c.
The low -
low level alarm setpoint cal,:i.brated to permit 20 minutes of steam driven auxiliary feed-pump operation with sufficient water available.
- 4.
Recommendation X.12.3.2.2 The tests have been completed on all three AFW pumps.
The data is presently being reviewed and analyzed.
A report on these* tests will be issued to you by June 2, 1980.
- 5.
Recommendation GL-2 Although we realize our commitment to automate the makeup supply valve (1DR6} does not satisfy this recommendation, the attached sheets pre~ent our bases for proposing this design change.
- 6.
Recommendation GL-5 Our existing auxiliary feedwatei automatic initiation meets safety grade design requirements, however, further comments will be held in.abeyance pending completion of the NRC Re-view of GS-7.
- 7.
Basis for Amdliary Feedwatei *Flow Requirements.*
We will submit the results of the above analyses to you by June 16,.1980.
If you should have any questions, please do not hesitate to con-tact us.*
Very truly yours,*
~
Frank !P. ~
General Manager -
Electric !Pr6duction
Backup Water Supply - Auxiliary Feedwater System The following are the sources of the backup water for the Aux-iliary Feedwater System.
(1)
Demineralized Water Storage Tanks (2)
Fire Protection and Domestic Water Storage Tanks.
(3)
Service Water System The latter two sources are not of the water quality that is de-sired in the steam generators and should be considered only as the emergency sources.
The Demineralized Water Storage Tanks can supply water to the Auxiliary Feedwater System in the following two ways.
(1)
Directly to the auxiliary feedwater pump suction through a complex piping and valving arrangement.
(2)
As makeup water to the Auxiliary Feedwater Storage Tanks (AFWST).
Both of these alternative flow paths of demineralized water sup-plying to the Auxiliary Feedwater System are non seismic and not safety related.
(The NRC Safety Evaluation report citing tornado missiles protection takes no credit for any source of water other than the service water source which is safety related)
- The direct flow path to the AF pumps is designed for full flow, however, since it passes through the vital switchgear room, it has to be kept dry during normal operation.
This results in a lengthy line of actions required to actuate this flow path when required.
The makeup flow path to the Auxiliary Feedwater Storage Tanks can be actuated by opening valve DR-6 and starting the necessary de-mineralized water transfer pump as required.
The amount of water available through this path might be limited by the capacity of the makeup system at a given time.
The auxiliary feedwater storage tank makeup on low level, if adopted as a procedure, should gen-erally enhance AF pump protection against the pumps running dry because of a delayed switchover to the alternate sources of water.
(The AF pumps do not trip on low pump suction pressure)
- The attached schematic drawing should aid in your unqerstanding of our position.
r D~t I
- IDl114"~ Wl\\Tlll :
1,,0.. AGI TNtlO 1 L---
Y.l\\f!O-tl I
r 9"Do,ooe... 11
'""fl l:
I I ;
lllM r - -. ----
Alt WAii A l
J one Ott I I ~ I 1 ",,' I', f ' l'I,_
IMI Ill '(
't
'r'(l"7Ce
'r!'~"nNnw**m-*.*.......
~~l: __
oo_~.~-~--*-*.._...
1~,..... -;i....__._
~,..._,~
MAKllll'
-J-"
tAr11,at,,
SUIVIC(
ftll)Ci I
t--.
AUK nLDO
,1..
'Ar,,*
.J 11" UAflZ F.c.
UAf4 UAFJ LO 6..
Ill..
lU
,i..
11" IAF61 tn
~Al IM J AUX I W --.--4
~.,~....
ZAf a
T
~
a T
)I SlRVICf WAHH U*"'T 1 llll 10..
,ftf:'W~T'.,._ _ __,
"UC£ "f r-l>d---Cl":t-......
I LO ti IJl\\r:PJ i__--t-c>-~*--0oit--------...:*=...**--_:.~--Lll-..-.... -~-.~~~= llD tl!lfl AM c;u1 : t.:
r to
= fHUWAllH 4"
11\\l li.l l Cl 1.11\\J JllJAI 11 fO lO
~*f'&t.
PIO
~
. KNf 1ftATeor. Mf A
, n
~bod-[llt;J~**
I
'° r--~t---ti1t--'~'"~'>z_i_._*_*~---~;_.........,.... --111E-'~'"~*0 1_
3-c~ llDttlTIAMnlN fflUWAUH
+*
A1u1i..y f...,,.,.,., !'iy*t-
~ ** a.-..,'
17Af It
- o e* IYIAM 1Mlll 10Af IMnl f
If fUMOINI Uf4lll,... 11111141 flUP
_. A._
I lllO U SO tJAFI OOVUINllll VALVI,-...,.r -'MAllll1IAIW VALVI I
I LO
~
2\\'
ll l:I NU Ptn. rnt~Ullll 10 oPf N FO. fAll ClP(N(D f C I All ClO!'lll FA - fAll AS II SP
. !"">nl Pll C M - NOl1Ml\\I I 'I CU'I NIP H
NORMl\\ll Y Cl C~I 0
~. llllOfOR OPHIAUD fr, ""',.,.., """.,
AH.........
I I,,... "
TUlll*INI L..yf. _J w.1 '3 IG 11oP """'
t.JlllMI* MAIN sn...,
VALVl lU I>
tMSIJI fO WOODWARD GOY COOLllMJ tUR M AIUNCl JACKU COOllM'I I f..
UllllllM 1t1 AllWtl l--00--t JACKl I CIKIUNU Lo -Loca10C1111M AVTo "'Ake uJ a bft 6
~N-.'V6. ~nucll es P\\Atl"AL. \\NUJ. 6'r° lt.EP~
W\\T\\1 All OP£1CA'T~Q
'f AL" 5 "'t H lt\\i 'W\\&J. OPEH OM J.oW A FWST LGVE.L C..oLoSE Vlf-fEN IA~I(
'~ f~t... {VALVlr F. O.)
ALT O&r'I T~AliSCIEI(
f>vM P 15 oN 1A Vtr AL ev~.
I.