AECM-82-598, Interim Deficiency Rept 4 Re Corroded Terminal Boards on Transmitters.Initially Reported on 820421.Corrosion Attributed to Moisture.Final Rept Expected by 830128

Interim Deficiency Rept 4 Re Corroded Terminal Boards on Transmitters.Initially Reported on 820421.Corrosion Attributed to Moisture.Final Rept Expected by 830128

ML20067D859
Person / Time
Site:	Grand Gulf
Issue date:	12/15/1982
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, AECM-82-598, NUDOCS 8212210375
Download: ML20067D859 (2)

Text

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E JAMES P. McGAUGHY. JR.

MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi P. O. B O X 164 0, J AC K S O N, MIS SIS SIP PI 3 9 2 0 5 December 15, 1982 ASSISTANT vtCE PRESIDENT I

Of fice of Inspection & Enforcement U. S. Nuclear Regulatory Commission $

Region II 4 c

101 Marietta Street , N.W.

Suite 3100 ] -

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Atlanta, Georgia 30303 "

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Attention: Mr. J. P. O'Reilly, Regional Administrator  ;~~.

Dear Mr. O'Reilly:

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SUBJECT:

Grand Gulf Nuclear Station .

Unit 1 Docket No. 50-416 License No. NPF-13 File 0260/15525/15526 PRD-82/23, Interim Report #4, Corroded Terininal Boards AECM-82/598 Re ference : AECM-82/226, 5/21/82 AECM-82/455, 8/6/82 AECM-82/479, 10/18/82 On April 21 1982, Mississippi Power & Light Company notified Mr. R. Butcher, of your of fice, o~ a Potentially Reportable Deficiency (PRD) at the Grand Golf Nuclear Station (GGNS) construction site. The deficiency concerns corroded terminal boards on pressure transmitters, flow transmitters, and level transmitters utilized in safety related applications at GGNS.

As reported previously, we have determined that this condition is reportable under the provisions of 10CFR50.55(e) because the corroded terminal boards could cause erroneous signals or loss of signals from the transmitters and, therefore, could have af fected adversely the safety of operations of the nuclear power plant.

A final report from an independent laboratory on the analysis of a corroded terminal board attributes the corrosion to the presence of moisture. As the transmitters were not supplied with a defect we have concluded that the provisions of 10,:FR21 are not applicable.

A final report is expected to be submitted by January 28, 1983, contingent upon locating the source of moisture entering the transmitters.

1 ours truly, 8212210375 821215 PDR ADOCK 05000416 S ppg ( ,

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. P. McGaup,h ~, Jr.'t OFFILIANw:

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I Mr. J. P.-O'Reilly. AECM-82/ 598 NRC Page 2 cc: Mr. M. L. St ampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Richard C. DeYoung, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. G. B. Taylor South Miss. Electric Power Association P. O. Box 1589 Hattiesburg, MS 39401 l

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