ML19247B005
| ML19247B005 | |
| Person / Time | |
|---|---|
| Site: | Yellow Creek  |
| Issue date: | 06/20/1979 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19247A971 | List: |
| References | |
| 50-566-79-09, 50-566-79-9, 50-567-79-09, 50-567-79-9, NUDOCS 7908060288 | |
| Download: ML19247B005 (2) | |
Text
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APPENDIX A NOTICE OF VIOLATION Tennessee Valley Authority License No. CPPR-172 Yellow Creek Nuclear Plant, Unit 1 Based on the NRC inspection June 5-8, 1979, certain of your activities were apparently not conducted in full compliance with NRC requirements as indicated below.
These items have been categorized o.
described in correspondence to you dated December 31, 1974.
A.
As required by Criterion V of Appendix B to 10 CFR 50, and as implemented by TVA Topical Report ITA-TR75-1A, Section 17.lA.5,
" Activities affecting quality shall be prescribed by documented instructions, procedures or drawings.
.and shall be accomplished in accordance with these instructions, procedures or drawings."
Quality Control Instruction QCI C-208 specifies requirements for obtaining and documenting concrete samples, and specifies actions to be taken for out of specification test results.
QCI C 208:
Appendix 4, states that concrete compressive test cylinders shall be removed from the molds at 16 to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after molding and shall have free water maintained on the entir:
ice area of the cylinder at -11 times. QCI C-201 requires verticai
,sertion of vibrators a sufficient distance into concrete to ensure consolidation of successive layers and requires deposition of concrete in a manner that will not result in concrete flow for any distance.
Contrary to the above:
1.
A concrete sample for Category 1 pour Al-D4 was discarded because measured sluep was out of specification on June 5, 1979.
2.
Several cylinders in the moist curing room were rurface dry on June 5, 1979.
3.
The mold for cylinder 684 was removed 29 hours3.356481e-4 days <br />0.00806 hours <br />4.794974e-5 weeks <br />1.10345e-5 months <br /> af ter mol'ing.
4.
Vibrators were inserted into the top layer of pour Al-D4 at actie angles and failed to penetrate to the previous layer.
5.
Concrete was deposited in one large pile from the bucket on several occasions during pour Al-D4 and allowed to flow excessive horizontal distances (6-8 feet).
This is an infraction.
B.
As required by Criterion V of Appendix B to 10 CFR 50, and as implemented by TVA Topical Report TVA-TR75-1A, Section 17.1A.5,
" Activities affecting quality shall be prescribed by documented instructions, procedures, or drawings...and shall be accomplished in accordance with these instructions, procedures or drawings."
7908060u?8 421 193
Tennessee Valley Authority Appendix A CPPR-172 Notice of Violation Chicago Brielge and Iron Company procedure WMS 479, Revision 0, part 4, states, "Th: chemical analysis of the powdered metal shall confcrm to AWS classification EH-14 in SFA 5.17 of Section II, Part C, iable 1 of the ASME code and the special requirements of this section."
Contrary to the above, the certified material test report for bulkweld powdered metal heat number 0479008 indicated a chemical analysis had only been conducted for three of the six required elements listed in Table 1 of SFA 5.17,Section II, Part C of the 1974 ASME code.
The bulkweld powdered metal had been used in the
' 9 merged arc welding of Unit 1 containment vessel plates.
s is an infraction.
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