ML19262A454
| ML19262A454 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/12/1972 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML19262A452 | List: |
| References | |
| 50-289-71-07, 50-289-71-7, NUDOCS 7910290799 | |
| Download: ML19262A454 (2) | |
Text
I 00 ENCLOSURE Description of Nonconformance Item Metropolitan Edison Company I
Docket No. 50-289 License No. CPPR-40 One item appears to be in nonconformance with a statement in the Final Safety Analysis Report (FSAR) as identified below:
The FSAR, Volume 2, Section 5.2.2.1, " Concrete:, states in part,
}
" Structural concrete work has been perfor=ed in accordance with i
Specifications for Structural Concrete for Buildings, ACI 301-66 modified as necessary for the more exacting requirements of the Reactor Building."
1.
Section 1405 of ACI 301-66 states in part, "The forms and ex-posed concrete shall be kept continuously wet for at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after placing".
Contrary to the above, it was found that, prior to completion
'of the 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> initial drying phase, the upper half of the fourth segment of the containment deme concrete was un-covered, and was cool and dry to the hand while the icwer half was covered with moist burlap and was warm to the hand.
27-Section 1201-of ACI-301-66 state in part, "Immediately following the initial curing and before the concrete has i
I dried, additAonal curing shall be accomplished by one of the
-following materials or methods:
1.
Continuing the method used in initial curing.
2.
Waterproof paper conforming to ASTM C-171.
3.
Other moisture-retaining, coverings as approved."
Contrary to the,above, the upper half of segment No. 4 of the containment dome concrete mass pour was found to have been dry precluding the continuance of additional curing.
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