ML20084R103
| ML20084R103 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities, 05000000 |
| Issue date: | 11/29/1973 |
| From: | Stephenson B COMMONWEALTH EDISON CO. |
| To: | Oleary J US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20084R054 | List: |
| References | |
| BBS-73-254, NUDOCS 8306140798 | |
| Download: ML20084R103 (2) | |
Text
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n Com zith Edison V
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F Ouad-Ci Generat!ng Sution Post Ofhce Box 216 Cordova. Illinois 61242 Telephone 309/654-2241
,9Qc &s BBS-73-254 b
7 DEC4 1973 "Enkgun v
g nIQ November 29, 1973
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John F. O' Leary, Dire ctor Directorate of Licensing Regulation U. S. Atomic Energy Commission Washington, D.C. 20545
SUBJECT:
Quad-Cities Nuclear Power Station, Unit 1, Docket No. 50-254, Hydraulic Shock Suppressor (Snubber) Inspection (Ref; Donald J. Skovholt ltr. dated October 1, 1973 to J. S. Abel)
Dear Mr. O ' Le ary:
The purpose of this letter is to inform you of the results of a routine inspection performed on the hydraulic shock suppressors during a Quad-Cities Unit 1 outage.
On November 21,1973 Unit 1 was shutdown to repair a sus-pected steam leak in the drywell.
At 12:40 a.m. all rods were in and at approximately 6: 00 a.m.
the reactor was
. vented to atmospheric pressure (the outage lasted a total of 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> and 25 minutes since initial pulling of rods was begun at 9: 05 p.m. the same day).
As a result of the steam leak in the drywell high airborne radiation levels existed.
Due to this condition self contained air pacs were necessary to enter the drywell, which make a careful inspection of all the hydraulic shock suppressors practically impossible.
However, later in the day the airborne radiation levels had decreased enough to allow a reduction in the respiratory protective require-ments to full f ace masks.
Due to the increased mobility, access to and inspection of the hydraulic shock suppressors was made possible.
All thirty-three hydraulic shock suppressors in the primary containment, which includes twenty-nine Bergen Patterson manufactured suppressors and four manufactured by Parker-Hannafin, were inspected.
The inspection included verifi-cation that no visible oil leaks existed and observation a
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Mr. J. F. O ' Le ary November 29, 1973 of the suppressor oil level.
All suppressors were found to be in satisfactory condition, with no maintenance ne-cessary.
As outage time permitted additional hydraulic shock sup-pressors manufactured by Grinnell (totaling fourteen),
which are not contained in the primary containment, were inspected.
Inspection of seven of the fourteen Grinnell suppressors revealed two to have minor leaks at a pipe fitting off the oil reservoir, however no oil leakage past the suppressor seals was n n ed.
Corrective action taken included tightening the fittings and refilling the oil reservoirs to the desired levels.
The remainder of the hydraulic shock suppressors will be inspected during the next shutdown greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in length.
Very truly yours, COMMONWEALTH EDISON COMPANY QUAD CITIES NUCLEAR POWER STATION s
Ad
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. B. Ste' henson Station d perintendent BBS /1k cc:
Regional Director Directorate of Regulatory Operations-Region III
.