ML20116C396

Revised Final Deficiency Rept (Rdc 16(80)) Re Rosemount Model 510 Du Trip/Calibr Units & Rosemount Model 1152 Pressure Transmitters.Initially Reported on 800603. Transmitters to Be Replaced.Next Rept Expected by 850601

ML20116C396
Person / Time
Site:	Perry
Issue date:	04/10/1985
From:	Edelman M CLEVELAND ELECTRIC ILLUMINATING CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
(RDC-16(80)), NUDOCS 8504260460
Download: ML20116C396 (3)

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P O. BOX 5000 - CLEVELAND, OHIO 44101 - TELEPHONE (216) 622-9800 - lLLUMINATING BLDG. - 55 PUBLIC SQUARE Serving The Best Location in the Nation MURRAY R. EDELMAN VICE PRESIDENT NUCLEAR April 10, 1985 Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE: Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Rosemount Model 510 DU Trip /

Calibration Units and 1152 Pressure Transmitters Supplied by General Electric

[RDC 16(80)]

Dear Mr. Keppler:

This letter is issued to revise our final report pursuant to 10CFR50.55(e) dated June 30, 1980, on the significant deficiency concerning Rosemount Model 510 DU Trip / Calibration Units and Rosemount Model 1152 Pressure Transmitters supplied by General Electric (GE) per our Deviation Analysis Report 27. Mr. J. Konklin of your office was notified on June 3, 1980, by Mr. W. Kacer of The Cleveland Electric Illuminating Company that these items had been supplied to the Perry Nuclear Power Plant (PNPP).

This letter contains a description of the deficiencies, an analysis of the safety implications and our revised corrective actions relative to the Rosemount Model 1152 Pressure Transmitter deficiency. It should be noted that our corrective actions relative to the Rosemount Model 510 DU Trip / Calibration Units were not changed.

Description of Deficiency Tne receipt of a letter from General Electric (PY-GEN /CEI 1291) notified PNPP of the following reportable conditions associated with Rosemount Model 510 DU Trip / Calibration Units and Model 1152 Pressure Transmitters supplied to PNPP by GE.

8504260460 850410 APR 151985 ,[ -;L PDR ADOCK 05000440 S PDR l0

Mr. Jcm:s G. Kcppler April 10, 1985 The Rosemount Model 510 DU Trip / Calibration Unit has a common mode failure of an essential-to-function switch, which determines the trip unit output logic. The second condition identified that the Rosemount Model 1152 Pressure Transmitter has a common mode failure of a capacitor on the amplifier board when the transmitter is exposed to an operating temperature greater than 175 F or when the damping potentiometer is rotated clockwise.

Analysis of Safety Implication The Rosemount Model 510 DU Trip / Calibration Unit deficiency as described above will result in an inoperable signal or more specifically the failure of the trip unit to provide an adequate trip signal when its associated set point is exceeded. The failure of the trip unit to perform its intended safety function could adversely effect our ability to establish a safe shutdown condition.

The common mode failure of the Rosemount 1152 Pressure Transmitter as described above will result in a drop in transmitter output current of up to 10 percent of the correct current. This could allow the continued operation of an associated safety-related system while system parameters are being exceeded, and thus create a condition which could affect the ability to establish a safe shutdown condition.

Corrective Action Repair of the deficient 510 DU Trip / Calibration Units is describe..

on General Electric's Field Disposition Instruction WNHW Rev. O and 1, and Field Deviation Disposition Request KL1-818. All trip units with serial numbers 3001 through 4203 were returned to Rosemount to be rebuilt and requalified. The reinstallation of these Trip Units was completed by January 23, 1985. Reinstallation of the units had been delayed due to the amount of time required for the manufac-turer to modify and return the replacement units.

We reported in our June 30, 1980 letter that our intention was to replace the amplifier boards of the affected 1152 transmitters. As a result of equipment qualification difficulties, we no longer consider replacement of the amplifier boards to be appropriate corrective action. We are therefore revising our corrective action. The Rosemount Model 1152 Transmitters will be replaced by Rosemount Model 1153 Transmitters. The replacements are being installed in sequence with our testing program. We will provide a report to you on our progress by June 1, 1985. Unit 2 work will be completed consistent with the Unit 2 conetruction schedule.

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'Mr. Jemas G. Kcppler April 10, 1985 Please call if there are additional questions.

Sincerely, Murra

'f R Edelman G

Vice President Nuclear Group MRE:pab cc: Mr. J. A. Grobe USNRC, Site Office Mr. D. E. Keating USNRC, Site Office Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 U.S. Nuclear _ Regulatory Commission c/o Document' Management Branch 20555 Washington, D.C.

Records Center, SEE-IN

, Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 1

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