ML19345D267
| ML19345D267 | |
| Person / Time | |
|---|---|
| Site: | Yellow Creek  |
| Issue date: | 11/14/1980 |
| From: | Murphy C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Parris H TENNESSEE VALLEY AUTHORITY |
| Shared Package | |
| ML19345D268 | List: |
| References | |
| NUDOCS 8012120354 | |
| Download: ML19345D267 (1) | |
See also: IR 05000566/1980014
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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101 MARIETTA ST., N.W., SUITE 3100
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ATLANTA, GEORGIA 30303
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In Reply Refer To:
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Tennessee Valley Authority
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H. G. Parris
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Manager of Power
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500A Chestnut Street Tower II
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Chattanooga, TN 37401
Gentlemen:
Thank you for your letter of October 21, 1980, informing us of steps you
have taken to correct the item of noncompliance concerning activities under
NRC Construction Permit Nos. CPPR-172 and CPPR-173 brought to your attention
in our letter of September 26, 1980. We will examine your corrective actions
and plans during subaequent inspections.
We appreciate your cooperation with us.
Sincerely,
Charles E. Mu phy,
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Reactor Construction and
Engineering Support Branch
cc:
J. F. Cox, Supervisor,
Nuclear Licensing Section
M. M. Price, Project Manager
M. A. McBurnett, Project Engineer
h. N. Culver, Chief,
Nuclear Safety Review Staff
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TENNESSEE VALLEY AUTHORITY
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CHATTANOOGA. TENNESSEE 374ot
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400 Chestnut Street Tower II
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October 21, 1980
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Mr. James P. O'Reilly, Direetcr
Office of Inspection and Enforcement
U.S. Nuclear Regulatory Commission
Region II - Suite 3100
101 Marietta Street
Atlanta, Georgia 30303
Dear Mr. O'Reilly:
YELLOW CREEK NUCLEAR PLANT UNITS 1 AND 2 - NRC-0IE REGION II LETTER RII:JPJi
50-566/80-14 AND 50-567/80-14 - INSPECTION REPORT - RESPONSE TO INFRACTION
The subject dated September 26, 1980, cited TVA with one infraction in
accordance with 10 CEd 2.201.
Enclosed is our response.
If you have any questions concerning this matter, please get in touch with
D. L. Lambert at FTS 857-2851.
Very truly yours,
TENNESSEE VALLEY AUTHORITY
L. M. Mills, Man ger
Nuclear Regulation and Safety
Enclosure
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Mr. Victor Stello, Jr., Directcr (Eualosure)
Office of Inspection and Enforcement
U.S. Nuclear Regulatory Commission
Washington, DC 20555
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Ol.TICIAL COPY
An Equal Opportunity Employer
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ENCLOSURE
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YELLOW CPEEK NUCLEAR PLANT UNITS 1 AND 2
RESPONSE TO INFRACTION 50-566/80-14-01 AND 50-567/80-14-01
Infraction
As required by Criterion XI of Appendix B to 10 CFR 50, and implemented by
PSAR Section 17.1 A.17, " Test results shall be evaluated to assure that test
requirements have been satisfied."
Contrary to the above, thirteen percent of test cylinders for concrete
class 401.5 AFW have broken below the specified strength and no QCIR has
been issued nor has an evaluation of the questionable results been made.
Corrective Action Taken and Results Achieved
QCIR 51057 was written and an evaluation was performed by the Yellow Creek
materials engineer. The evaluation was conducted according ta General
Construction Specification G2, " Plain and Reinforced Concretc," This
evaluation disclosed that the mix designs for each affected strength class
required minor mix adjustments. In cddition, the evaluation indicated that
a procedural change was needed to ascertain that the cylinder test data
were being tracked and evaluated. The materials engineer made the
appropriate mix changes resulting in a lower failure rate which will bring
the overall percentage back within the acceptable 10 percent limit.
Finally, a review of the cancrete test dispositioned in QCIR 51057 revealed
that the design strength should be realized at a later than design age but
before the concrete is su)jected'to their design stresses.
Corrective Steps Which Will Be Taken to Avoid Further Noncompliance
To prevent further recurrence, QCI 209 (Concrete Strength Testing) will be
revised in order to clearly define the requirements for the materials
engineer to write a QCIR for each test that fails in accordance with
procedure CEP 15.01.
The materials engineer will be reinstructed in these procedures.
Date When Full Compliance Will Be Achieved
We expect to be in full compliance by December 1, 1980.
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