ML20009G052

Final Deficiency Rept Re Defects in Foxboro Removable Manual Controller Modules,Initially Reported on 810626.Defective Modules Replaced W/Modules Containing Correct Wiring Arrangement.Also Reported Per Part 21

ML20009G052
Person / Time
Site:	Bellefonte
Issue date:	07/24/1981
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-81 10CFR-050.55E, NUDOCS 8108030283
Download: ML20009G052 (2)

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,!?/ y I-400 Chestnut Street Tower II July 24, 1981 BLRD-50-438/81-43 BLRD-50-439/81-45

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rd i 3 Mr. James P. O'Reilly, Director g

Office ,f Inspection and Enforcement 1 $N7 1

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U.S. Nuclear Regulatory Commission .3OL /-

Region II - Suite 3100 t gu%' va-

101 Marietta Street G Atlanta, Georgia 30303 -p 8 N O

Dear Mr. O'Reilly:

BELLEFOME NUCLEAR PLANT UNITS 1 AND 2 - DEFECTS IN FOXBORO REMOVABLE MANUAL CONTROLLER MODULES - BLRD-50-438/81-43, BLRD-50-439/81 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Celenjak on June 26, 1981 in accordance with 10 CFR 50.55(e) as NCR's 4 and 5. Enclosed is our final report. We cor sider 10 CFR Part 21 to be applicable to this deficiency.

If you have any questions concerning this matter, pleaie get in touch with D. L. Lambert at FTS 857-2581.

Very truly yours, TENNESSEE VALLEY AUTHORITY

'f?ffI~

L. . Mills, Ma4ager Nuclear Regulation and Safety Enclosure cc: Mr. Victor Stello, Jr., Director (Enclosure)

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

[ S ofo 8108030283 810724 o PDR ADOCK 05000438 S PDR

e ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 OSFECTS IN FOXBORO REMOVABLE MANUAL CONTROLLER MODULES BLRD-50-438/81-43, BLRD-50-439/81-45 10 CFR 50.55(e)

FINAL REPORT Description of Deficiency York Electro-Panel Control Company, Incorporated, submitted supplier nonconformance reports (NCR's) 4 and 5 dated May 28, 1981 as a result of a Foxboro Company telegram to them dated May 21, 1981. The nonconformance reports indicated a manufacturing defect in the model 2AC-D+A4+RM, removable =anual controller modules. The actual problem was that the wires to cable connector pins 13 and 14 were reversed. The problem was detected during an inspection at the Foxboro manufacturing facility. These defective =odules were in panels 1IX-II-011E, 2IX-II-011E, 1IX-II-011N, and 2IX-II-011N, which were still in the manufacturing process. Six of the eight modules in these panels were defective.

Eight of the model 2AC-D+A4+RM modules had been delivered to the Bellefonte plant site =ounted in panels 1IX-IR-016C-A, 2IX-IR-016C-A, 1IX-IS-016 C-B ,

2IX-IS-016C-B, 1IX-II-011P, and 2IX-II-011P. Four of the eight modules in these panels were found to be defective by a Foxboro service representative.

Safety Implications Had these modules with the crossed wires gone undetected and either the removable =anual card or the controller card had been removed from the module while the systems were operating, a loss of controller function would have been experienced. This occurrence would cause an unpredictable controller signal to (1) the auto bypass valves to the condensate storage tank, (2) the short cycle recirculation valves (CM-ILCV-125 and CM-IFCV-081), and (3) the motor-driven auxiliary feedwater pump discharge valves (CA-PCF-046A and CA-PCF-047B). This could adversely affect safety of operations of the plant.

Corrective Action The defective modules still at the Foxboro manufacturing facility were replaced with modules containing the corcect wiring arrangement. A Foxboro field serviceman has inspected those modules already delivered to 'the Bellefonte plant site and has replaced the defective modules.

TVA does not have similar equipment of the same model series in any nuclear i

plant applications other than the subject contract for Bellefonte Nuclear Plant.

P

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