ML20010J214
| ML20010J214 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek, Callaway  |
| Issue date: | 09/18/1981 |
| From: | Petrick N STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| SLNRC-81-108, NUDOCS 8109290719 | |
| Download: ML20010J214 (2) | |
Text
~
s SNUPPS Standardered Nuclear Unit i
Power Plant System 3
5 Choke Cherry Road i
Rockviles, Maryland 20050 (J01) 80M10 September 18, 1981 i
SLNRC 81-108 FILE:
0541 73.\\. gop' 9,,
j SUBJ:
.SER Open Issues k
9 SL I
Mr. Harold R. Denton, Director J
Sg
/ A C
(/
n Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission k u,,%Jg /Sg
'\\
" 574 4, 7 p
Washington, D. C.
20555 Docket Nos.
STN 50-482, STN 50-483 and STN 50-486 9,/r x
s f
.D
& liks\\ '
\\
Reference:
SLNRC 81-82, dated September 1,1981:
ICSB Review
Dear Mr. Denton:
i In discussions with Dr. Gordon Edison, NRC project manager for the SNUPPS applications, potentially open issues in the NRC's Safety Evaluation Report (SER) have been identified.
The purpo:,e i
of this letter is to provide information that should close two of l
the issues.
During the course of the ICSB review, instrumentation provided on ihe auxiliary shutdown panel was discussed.
Enclosure A to the referenced letter provided a description of reactor coolant i
temperature indicators on the panel. A design change will be made such that both T-hot and T-cold will be indicated on the auxiliary shutdown panel. Plans are to have two T-hot instrument loops powered from separate protection sets and two T-cold loops sim-i ilarly powered from separate protection sets.
Isolation, routing, i
and indicator quality will be the same as that described in the j
reference. Appropriate FSAR changes will be made at a later date when the engineering of this design change is more complete. The l
j above information should resolve this issue and the NRC can confirm j
the adequacy of the design when the FSAR changes are made.
The Structural Engineering Branch (SEB) has-indicated that they will i
not accept-the SNUPPS design to meet Regulatory Guide 1.12, Revision 1.
More specifically the design did not include a discrete device to meet the Guide's position c.l.b.
In order to satisfy the NRC's-
$O/
J O
i t
8109290719 910918 PDR ADOCK 05000482 E
PDR.
O SLNRC 81-108 Page Two concern, a design change will be made to add a response spectrum recorder at the containment foundation. Appropriate FSAR changes will be made at a later date when more inforr.ation on the new equipment is available. This commitment to add a response spectrum recorder should be sufficient to resolve the SER item.
Very truly yours, e-hvc Nicholas A. Petrick RLS/mtk cc:
J. K. Bryan UE D. F. Schnell UE G. L. Koester KGE D. T. McPhee KCPL W. A. Hansen NRC/ CAL T. E. Vandel NRC/WC
__