ML20197G201
| ML20197G201 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 01/03/1984 |
| From: | Noonan V Office of Nuclear Reactor Regulation |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| CON-WNP-0719, CON-WNP-719 NUDOCS 8401110459 | |
| Download: ML20197G201 (1) | |
Text
'{
Distribution ~..
k Central File 3
gp
'EQB-Reading File MEM09ANDUM FOR:
Albert Schwencer, Chief Licensing Branch No. 2 Division of Licensing FROM:
Vincent S. Noonan, Chief Equipment Qualification Branch Division of Engineering
SUBJECT:
REMOVAL OF RCIC SYSTEM FROM EQ 'ROGRAM AT WNP-2
Reference:
Memo for V. S. Noonan from B. W. Sheron dated December 15, 1983; same subject The reference memo from RSB (copy attached) is forwarded to Licensing Branch 2 for action.
Please notify the licensee of the results of the RSB review.
The RCIC system is presently included in the WNP-2 Equipment Qualification program and should be so maintaired as recommended by RSB.
Vincent S. Noonan, Chief Equipment Qualification Branch Division of Engineering cc:
R. Vollmer J. P. Knight B. Sheron R. Auluck R. LaGrange EQ Section
Contact:
A. Masciantonio Ext. 28205 64,f
\\
/
/
8401110459 840103
.AF.
ADOCK 05000397 f/
orrica) D..E./..E..QB@..7...
D.E../. E..Q..B.. p. (.c..t...
. D..E../.E..Q B....I i
y, scumur) A.Mascia ntonio RLaGrange VNoon
......a.n/.V W.,. /.f..m... (.4 carr) 12/..Jd /.83 12/]t /83
"8"
~* ' ec u 24 OFFICI L RECORD COPY
- v.s. cno 1982-40o.247
g ** *%}$.
UNITED ST ATES NUCLEAR REGULATORY COMMiss!ON i
iS Y,@ 1 l
WASHINGTON. D. C. 20555 Gy N..v i
.DEC 151983 MEMORANDUM FOR:
Vincent Noonan, Chief, Equipment Qualification Branch, DE FROM:
Brian W. Sheron, Chief, Reactor Systems Branch, D51
SUBJECT:
REMOVAL OF RCIC SYSTEM FROM EQP AT WNP-2
Reference:
W.E. Vesely et. al. ; " Measures c' Risk Imoortance and Their Acolications" NUREG/CR-3385, July,1983 In a letter dated July 26, 1983 from G.C. Sorensen to A. Schwencer, the Washington Public Power Supply System (the applicant) indicated its intent to remove RCIC from the WNP-2 Equipment Qualification Program (EQP).
The applicant has stated that the ADS system in conjunction with the low pres-sure ECC systems provides a fuliy automatic backup to the high pressure core spray (HPCS) system.
We have reviewed tne applicant's submittal and agree tha a fully automatic backup to HPCS is available.
We do not agree however, the RCIC should be removed from the EQP at this time.
This position is based on the results of risk sensitivity studies performed for a BWR/6 and discussed in the ref-erence report.
These results indicate that the unavailability of the RCIC system more than doubles the overall core melt frequency.
Unless it can be demonstrated that the unavailability of RCIC will not significantly increase risk at WNP-2, RCIC should be included in the EQ Program.
tGy Jk Brian W. Sheron, Chief Reactor Systems Branch, DSI cc:
R. W. Houston 4 _Basciantonio RSB Secti6h' Leaders Section 8 Members R. Mattson l
CONTACT:
T. Collins, RSB X24478 93+H3cG W + l,
.j
-