ML19208C437

From kanterella
Jump to navigation Jump to search
Responds to NRC Re Infraction Noted in IE Insp Rept 50-328/79-24.Corrective Actions:Welds 2CVC-163, 2CVC-164 & 2CVC-165 Repaired & Welder Foreman Will Be Reinstructed on Requirements by 791012
ML19208C437
Person / Time
Site: Sequoyah Tennessee Valley Authority icon.png
Issue date: 09/21/1979
From: Mills L
TENNESSEE VALLEY AUTHORITY
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 7909260430
Download: ML19208C437 (2)


Text

.

TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Straat Tcvar II September 21, 1979 Mr. James O'Reilly, Director Offica of paction and Faforcement U.S. Nuclear Regulatory Commission Region II -

its 3100 101 Marietta treat Atlanta, Georg 30303 Daar Mr. O'Reilly:

SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 - NRC-0IE REGION II LETTER RII MJG 50-327/79-43 AND 50-328/79 INSPECTION REPORT - RESPONSE TO INFRACTION 50-328/79-24-06 The subject letter dated September 4,1979, cited TVA with one infraction.

Enclosed is our response'to that infraction.

If ynu have any questions concerning this matter, please get in touch with D. L. Lambert at FTS 854-2581.

Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulation and Safety Enclosura Mr.VictorStallo,Jr., Director (Enclosura)[

ec:

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 1012 354 e

W f\\

hh An Equal Opportunity Employer n

9 ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2 RESPONSE TO INFRACTION 328/79-24-06 Infraction As required by Criterion V of Appendix B to 10 CFR 50, and as implemented by the FSAR, paragraph 17.lA.5, " Activities affecting quality shall be prescribed by dcenmented instructions, procedures or drawings.

. and shall be accotplished in accordance with these instructions, procedures or drawings." TVA Process Specification 1.M.l.2(b) dated December 8, 1978, states in paragraph 4.1, "Each welder or welding operator shall be qualified in accordance with the requirements of ASME Section IX (?rocess Specification 1.M.2.2) prior to performing welds to the requirements of the particular ASME Code listed in paragraph 1 of this specification."

Contrary to the above, on August 13, 1979, Class 1 piping weld 2CVC-163 was performed by a welder not qualified to the specified weld procedure (GT88-01) for the thickness welded. Welds 2CVC-164, 2CVC-165, and 2CVC-166 had previously been performed by the same welder and were also made to a wall thickness which exceeded the qualification of the welder to the specified weld procedure.

The four welds are located in the chemical and volume control system.

Corrective Steps Which Have Been Taken and the Results Achieved Welds 2CVC-163, 2CVC-164, and 2CVC-165 were repaired by removing all weld metal in excess of 3/8-inch thickness and then rewelding by a qualified welder using SMAW process weld procedure GTSM 8801A. Weld 2CVC-166 was not complete at the time of the NRC inspection and was com-pleted by a qualified welder. Therefore, no corrective action was necessary on this weld. A review of all other safety-related construction welds was conducted and those welds which were found to have been completed by unqualified welders have been nonconformed in accordance with Sequoyah Nuclear Plant Construction Procedurc No. P-2, " Handling Nonconformances,"

and are now being dispositioned.

Corrective Steps that Shall Be Taken to Avoid Further Noncompliance To preclude further noncompliance, welder foremen will be reinstructed on the requirements for welder certification. Also, measures will be taken to ensure that newly appointed foremen and assistant foremen are instructed in these requirements. Additionally, the weld record review process at Sequoyah Nuclear Plant has been revised to ensure that errors are identified and properly addressed.

Date When Full Compliance Will Be Achieved We will be in full compliance on October 12, 1979.

1012 355