ML20010J080

Responds to NRC 810813 Ltr Re Violation Noted in IE Insp Repts 50-413/81-17 & 50-414/81-17.Corrective Actions: Training of Inspectors & Craftsmen in Rebar Placing Tolerances Has Been Performed

ML20010J080
Person / Time
Site:	Catawba
Issue date:	09/03/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010J074	List: ML20010J080
References
NUDOCS 8109290574
Download: ML20010J080 (2)

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DUKE PowEn COMPANY POWER UUILDING 422 Sourit Cnuncer STREET, CHAHIDTTe, N. C. 2a242 WILLIAM O, PA R M E R, J R.

Vier Pntsior=v TELEPwo=C Anta 704

$t tane Paocuctio= g 373-4083 Mr. James P. O'Reilly, Director

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U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: RII:PKV 50-413/81-17 50-414/81-17

Dear Mr. O'Reilly:

Please find attached a. response to Infraction No. 414/81-17-01 as ident3fied in the above referenced Inspection Report. Duke Power Company does not consider any information contained in this inspection report to be proprietary.

I declare under penalty of perjury, that the statements set forth hereit.

are true and correct to the best of my knowledge.

Very truly yours, l

_ . . . - td, n ' -

William O. Parker, Jr RWO/php Attachment ec: NRC Resident Inspector Catawba Nuclear Station s

8109290574 810924 PDR ADOCK 05000413 G PDR

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Duke Power Company 1 Catawba Nuclear Station Response to Violation 414/81-17-01:-

Violation:

10 CFR 50, Appendix B, Criterion V, as implemented by Topical Report Duke 1-A, Section 17, Paragraph 17.1.1.5 requires that activities affecting quality be accomplished in accordance with prescribed drswings. Drawing

! No. CN-1051-40, requires that-rebar spacing at the reactor coolant pump base blockouts be 1 1/16-inch minimum. Drawing Nos. CN-1051-47 and CN-1051-49 require that rebar spacing for the pressurizer shield wall be

! 1 1/16-inch minimum.

Contrary to-the above, activities affecting quality were not accomplished in accordance with prescribed drawings in that:

1. On March 26, 1981 rebar spacing at the reactor coolant pump base blockouts was zero to 3/4-inch in three places.

2. On' April 15, 1981 rebar spacing at the pressurizer shield wall was '

zero to one-inch in one area.

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Response

1. Dake admits violation.

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2. Craft and inspection personnel either failed to detect the rebar spacing problem or did not obtain proper written authorization to allow closer spacing of the bars.

3. As a result of an earlier NRC Inspection on 1/25/80 a similar problem with rebar spacing was found and subsequent training was conducted on 1/29/80 in rebar placing tolerances per ACI-301-72 and design specifi-cation CNS 1109.00-1. Also, as part of the training, inspectors were instructed to check rebar dowels after concrete placement for proper

' spacing and cover. The concrete pours which this violation affects were 4

made prior to the above described training: RBf2 Reactor Coolant Pump

! Support block-out near 220 degrees - part of pour 2140 placed on 6/19/78

' and RB#2 Pressurizer Wall Dowels in operating floor pour 4200 placed on 10/11/79.

Nonconforming Item #'s 11525 and 11667 were generated as a result of this violation to report the spacing problems which were evaluated and found acceptable as are.

'4. Corrective action per NCI's 11525 and 11667 requires additional training of inspectors and craftsmen in rebar placing tolerances.

5. Applicable training has been performed and no further corrective action is deemed necessary.