ML20234C939
| ML20234C939 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Quad Cities |
| Issue date: | 02/08/1973 |
| From: | Skovholt D US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Mangelsdorf H Advisory Committee on Reactor Safeguards |
| Shared Package | |
| ML20234A777 | List:
|
| References | |
| FOIA-87-40 NUDOCS 8707070028 | |
| Download: ML20234C939 (3) | |
Text
I-
. c.
- 4, UNITED STATES af 2-ATOMIC ENERGY COMMISSION g
~'
M WASHINGTON, D.C. 20545
- g,Ch hm e February 8, 1973 9 12
- Docket Nos. 50-254 and 50-265
.... L t C;!!
.. )
Mr. Harold G. Mangelsdorf Chairman, Advisory Comittee on Reactor Safeguards l
U. S. Atomic Energy Commission Washington, D. C.
20545
Dear Mr. Mangelsdorf:
Sixteen (16) copies of the following are transmitted for the Committee's information:
Letter to Commonwealth Edison Company dated February-2, 1973, requesting additional information regarding the adequacy of the spent fuel pool structures at Quad-Cities Units 1 and 2 to withstand a spent fuel shipping r
cask drop accident.
i Sincerely, 7
,f! h'd fr' Donald J.-
vholt Assistant Director for Operating Reactors Directorate of Licensing
Enclosures:
As stated
$Dy0 g 979g39 THOMAssy-40 PDR If e :. b o,na 1
n i
2
'"g p, w n 6 4 m rt q.telt 5
SAo J:nmJ b L a @ @oL x
a u 77 7@756#
d ve/ICIAL USE ONLY
. f.
.t.
tS5
^*'
SUPPLEMENT NO. 162 CAR'EGORY B Quad Cities. Unit 1 February 23, 1973 19 01 Pressure Switch Setpoint Drift yYb
- p,,;
Commonwealth Edison Company TWI dated January 19. 1973 repor d I that an ECCS Reactor Low Pressure Permissive pressure switch; actuated at 271 psig instead of 300-350 psig. The pressure -
switch was recalibrates and returned to service.
The Regulatory Staff is investigating the pressure switch set-point drift problem.
Commonwealth Edison Company letter dated January 25. 1973 reports further on the incident. The switch in question is a Barton Model 288. The calibration frequency has been it. creased from quarterly to biweekly.
No ACRS action 'Is recommended.
The anclosed material may be discarded after your review.
(JCM)
HMH MSIV Limit Switch Inoperable ACRS Commonwealth Edison Company 'lVX dated February 2.1973 reports that a limit switch on one MSIV was found to be inoperable its redundant backup is operable and its instrument channel has been tripped for safety by removing a fuse.
No ACRS action is recomended.
i The enclosed material may be discarded after your review.
(JCM)
Quad Cities. Units 1 & 2 HMH Cask Drop Protection ACRS AEC/L letter dated February 2, 1973 requests additional information regarding the applicant's proposed cask drop protection. The requested information includes:
1.
Location of the center of gravity of the cask 2.
A discussion of less than perfect pert'ormance of the mat and essk 3.
Structural loadings 4.
Design criteria 5.
Extent of local damage 6.
Detection of water leakage omer,
ACRS.
su=c >
...JcM;by
.,0FF{,0IALySEONLY 2/23/73 r-. a c-,E O m a aieuo
~===== Y a,:,.-, --,
~~
^
~
'~ ~~~~ ~
v OFFICIAL USE ONLY SUFFLEMENT NO. 162 CATEGORY B Ouad Cities. Units 1 & 2 Continued February 23, 1973 f::
7.
Radiation resistance of crushable material i,[
8.
Drawings of the system with details of various component,e #
locations v
9.
Assurance that no single failure will cause unacceptable consequences No ACRS action is recommended.
The enclosed material may be discarded after your review.
OCM) i omer >
SURNAME >
oart >
.0FFICIAL.USE.ONLY Form ATC-stb (Res. 9 53) AECM 0240 e*o e43-M-s:use 44& m