05000416/LER-1983-181, Updated LER 83-181/03X-1:on 831110,channel C as-found Setpoints for Undervoltage Trip Were 116.2-volt Ac.Cause Unknown.Voltage Adjusted within Desired range.W/840221 Ltr

Updated LER 83-181/03X-1:on 831110,channel C as-found Setpoints for Undervoltage Trip Were 116.2-volt Ac.Cause Unknown.Voltage Adjusted within Desired range.W/840221 Ltr

ML20086R749
Person / Time
Site:	Grand Gulf
Issue date:	02/21/1984
From:	Dale L, Parker J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-83-181-03X, LER-83-181-3X, NUDOCS 8403010121
Download: ML20086R749 (3)

LER-2083-181, Updated LER 83-181/03X-1:on 831110,channel C as-found Setpoints for Undervoltage Trip Were 116.2-volt Ac.Cause Unknown.Voltage Adjusted within Desired range.W/840221 Ltr

Event date:
Report date:
4162083181R00 - NRC Website

text

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., E Inn November 11. 1983. while nerformina calibration of RPS electrical I rin n lorotection asseinbly channel "C". the "as found" setpoints for under-J E l voltage trip were 116.2VAC. This is contrary to T.S.4.8.4.3 which 1 E treceutres tne undervoltage setpcints to be 117VAC. This is reported j oe lpursuant tc T.S.6.9.1.13.a. Thia event had no offect on the health and g  ;

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. J E E MISSISSIPPI POWER & L Helping Build Mississippi P. O. B O X 164 0, J AC K S O N. MIS SIS SIP Pl 3 9 2 0 5 34 FEB27 A 9 : 06bruary 21, 1984 NUCLEAR PetCDUCTION DEPARTMENT U. S. Nuclear Regulatory Commission EcElen II 101 Marietta St. , N.k'. , Suite 2900 Atlanta, Georgia 30303 Attention: Mr. J. p. O'Reilly, Regional Administrator

Dear Mr. O'Reilly:

SL'PJFCT: Grand Gulf Nuclear Statlen t'ni t 1 Docket No. 50-416 License No. NPF-13 File 0260/L-835.0 Update Report - RPS Electrice]

Protection Asser.bly Channel "C" Undervoltage Trip Setpcints Out of Toleranc.e LER 83-181/03 X-1 AECM-84/0084, This letter submits an update to a previous report submitted on December 12, 1983. The evant for which the report was submitted occurred on November 11, 1983, while performing calibration of RPS electrical protection assembly channel "C", when the "as found" setpoints for undervoltage trip vere 116.2 VAC. This is contrary to Technical Specificaticn 4.8.4.3 which requires the undervoltiEe trip setpoints to be 117VAC. This war, reported pursuant to Technical Specification 6.9.1.13.a.

All corrective action assc iated v4th the event is complete. Attached is LER 83-181/03 X-1 which is e finol report.

Yours truly, p

L. F. Dale h

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Manager of Nuclear Services EBS/SHH: sad Attachment ec: (See Next Page) 0FI'ICIAL CON 7[23

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Member Middle South Utilities System

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cc: Mr. J. B. Richard -(w/a)

Mr. R..B. McGehee (w/o)

' Mr.'T. B. Conner (w/o). '

Mr.'G. B.-iTaylor.'(w/o)

Mr. : Richard _C. _DeYoung Director (w/a)

Office of Inspection & Enforcement

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