ML19322B552
| ML19322B552 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 06/14/1974 |
| From: | Thies A DUKE POWER CO. |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7912040581 | |
| Download: ML19322B552 (2) | |
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Mr. Angelo Giambusso
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Deputy Director for Reactor Projects Directorate of Licensing A
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Washington, D. C.
20545 RE:
Oconee Unit 1 Docket No. 50-269
Dear Mr. Giambusso:
On March 18, 1974 the annual inspection of Oconee Unit 1 Reactor Building was perforced, pursuant to Technical Specification 4.4.1.4.
The inspection was performed in accordance with approved test procedure PT/0/A/0150/16, Reactor -
Building Inspection Tes t.
A visual examination was made of accessible intericr and exterior surfaces of the containment structure and its components. The following are discrepancies found during the inspection:
(1)
A surface crack was found on the exterior side of the secondary shield wall.
The crack had a maximum width of 0.002 inches and a measured depth of 0.0!4 inches.
This crack did not extend through the shield wall and does not present any loss of structural integrity.
The crack will be rechecked during the next annual inspection of the Reactor Building.
(2) Tendon Srease caps in the East and West Penetration Rooms were found to have leaked a small amount of grease around the filler plug threads.
The filler plugs are being repaired by applying a sealant to the threads.
(3)
Grease spots were observed at two construction joints in the Reactor Building.
The first grease spot was firs t observed during initial greasing of tendons.
The second grease spot is near the unit vent.
Both areas will be checked i
on an annual basis, (4)
Two electrical penetrations were found to have low SF-6 gas pressure.
Both were repressurized to 30 psig.
5476 7912040 N.1-
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Mr. Angelo Giambusso Page 2 j
June 14, 19 74 i
From this inspection no evidence of deterioration was found which could effect i
the containment's structural integrity or leak-tightness.
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Very truly yours, S
A. C. Thies l
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