ML20050C583
| ML20050C583 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 03/17/1982 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | William Cahill GULF STATES UTILITIES CO. |
| References | |
| NUDOCS 8204090123 | |
| Download: ML20050C583 (4) | |
Text
fQ-Lj Y w-
%p p
n rn q
n.
m n,
o g
g.
e,-
y u
u DISTRIBUTION:
Docket File RKendall LB#2 File RCapra MAR 17 1982 DEisenhut/RPurple RTedesco TZinneman(ANL)
- Docket Nos. 50-458/459 ASchwencer RPerch JStefano bcc : TERA EHyl ton NSIC Dewey, OELD NRC PDR Mr. William Cahill, Jr.
OI&E Local PDR Senior Vice President Region IV ACRS (16)
River Bend Nuclear Gr up Resident Inspector o
Gulf States Utilities Company SHanauer P. O. Box 2951 RMattson Beaumont, Texas-77704 HThompson Attn: Mr. J.E. Booker RVollmer RHartfield, MPA
Dear Mr. Cahill:
FRosa CRossi
Subject:
NRC Staff Position for Remote Shutdown Capability of River Bend Station (Units 1 and 2)
Recent Instrumentation Control System Branch (ICSB) reviews of BWR remote shutdown system designs (required by GDC 19) have identified concerns regarding the capability of those designs to achieve hot and subsequent cold shutdown from locations outside the main control room.
In the case of River Bend, our preliminary finding is that certain single failures may preclude shutdown outside the control room. The NRC staff position, and the design criteria and guidelines pertaining to our position, are enclosed for your consideration.
It is requested that you revtew the enclosed and advise, within seven (7) days of receipt of this letterc-when we may expect to receive your response.
If there are any questions, please contact either R. Perch or J. Stefano of my staff.
A\\
Sincerely, p
b RECGlygn
-9 sA. Schwencer, Chief MAR 2 4 N2h Licensing Branch No. 2 E-ak p' Division of Licensing g
//
Enclosure:
s 4
As stated s
cc: See next nana 8204090123 820317 PDR-ADOCK 05000458 F
PDR 1
6" l\\
/
%2,gM,,,.DL,@
,,B,C,,,
"'a>
Af.409.ip.t...M.c. p.9.c.e r..
..,,,,,,,.........]
- "" "' I
,4 3
/82 3
/82 omp w:c ronu ais hoo uncu om.o -
OFFICIAL RECORD COPY
'u " " -329 24
~
1 I
Mr. William J. Cahill, Jr.
Senior Vice President River Bend Nuclear Group Gulf States Utilities Company Post Office Box 2951 Beaumont, Texas 77704 ATTN:
Mr. J.E. Booker cc: Troy B. Conner, Jr., Esquire Conner and.Wetterhahn 1747 Pennsylvania Avenue, NW Washington, D.C.
20006 Mr. William J. Reed, Jr.
Director - Nuclear Licensing Gul f States Utilities Company Post Office Box 2951 Beaumont, TX 77704 Stanley Plettman, Esquire Orgain, Bell and Tucker Beaumont Savings Building Beaumont, TX 77701 William J. Guste, Jr., Esquire Attorney General State of Louisiana P.O. Box 44005 State Capitol Baton Rouge, LA 70804 Richard M. Troy, Jr., Esquire Assistant Attorney General in Charge State of Louisiana Department of Justice 234 Loyola Avenue Nea Orleans. LA 70112' A. Bill Beech Resident Inspector P.O. Box 1051 St. Francisville, LA 70775 e
9
.=
~
E.'CLCSURE ICSB POSITION FOR REMOTE SHUTDOWil CAPABILITY FOR RIVER BEtiD To Meet GDC-19 (As interpreted in SRP Section 7.4) l
- 1) The design should provide redundant safety grade capability to achieve and maintain hot shutdown from a location or locations remote from the control room, assuming no fire damage to any required systems and equipment and assuming no accident has occurred.
Credit may be taken for manual actu-ation (exclusive of continuous control) of systems from locations that are reasonably accessible from the Remote Shutdown Panel.
Credit may not be taken for manual actions involving jumpering, rewiring, or disconnect-ing circuits.
- 2) The design should provide redundant safety grade capability for attaining subsequent cold shutdown through the use of suitable procedures.
To Meet Appendix K (,ECCS Requirements)
- 3) The design should be such that the manual transfer of control to the remote location (s) should not disable any autematic actuation of ESF functions while the plant is attaining or maintained in hot shutdown, other than where ESF features are manually placed in service to achieve or maintain hot shutdown.
It is p'ermissible to disable automatic LPCI actuation in this manner unly when necessary in order to enable control of the RHR sys-tem from the remote location and while operating this system to effect cold shutdown from hot shutdown.
To Meet Appendix R (Fire Protection Requirements)
- 4) The de ign should provide, as a minimum, non-redundant non-safety grade systems necessary to achieve and maintain hot shutdown from either the con-trol room or from a remote location (s) assuming a postulated fire in any
-2_
firc arca, including" th: ::ntr:1 room er the Remote Shutdown Panel.
Cre-dit may be taken for manual actuation (exclusive of continuous control) of systens from locations that are reasonably accessible from the control room or the Remote Shutdown Panel, as applicable.
Credit may not be taken for manual actions involving jumpering, reairing, or disconnecting ci rcui ts.
- 5) The design should provide, as a minimum, non-redundant non-safety grade systems necessary to achieve and maintain cold shutdown from either the control room or from a remote location (s).
The design should be such that in the event of fire damage in any fire area, systems could be repaired or made operable within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> if required for cold shut-down.
For further guidance, see 10 CFR Part 50, Appendix R.
l l
s e
9
'