ML17275A656

Responds to IE Bulletin 80-16, Potential Misapplication of Rosemount,Inc Models 1151 & 1152 Pressure Transmitters W/Either a or D Output Codes. Transmitters Will Be Converted to E Output Code Models

ML17275A656
Person / Time
Site:	Columbia
Issue date:	08/18/1980
From:	Renberger D WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
ELE-KAH-80-012, IEB-80-16, NUDOCS 8010280610
Download: ML17275A656 (2)

Text

Was ington Public Power Supply System A JOINT OPERATING AGENCY P. 0. QOX 988 3000 GEO. WASHINCtON WAY RICHLANO. WASHINOYOte 99352 PHONC (509) 375 5000 August 18,'980 ELE-KAH-80-012 Cocket No. 50-397 t1r. R. H. Engelken, Oirector 4+i U. S. Nuclear Regulatory Commission pq ~n~~~O~', ~g Op /O~

Region V C~ 'I'g r/p~

1990 N. California Boulevard Suite 202 Walnut Creek Plaza (

Walnut Creek, Cali.for'nia 94596 Oear t1r. Engelken:

Subject:

WPPSS NUCLEAR PROJECT NO. 2 RESPONSE TO IE BULLETIN 80-16 The subject IE bulletin, "Potential Hisapplication of Rosemount Inc.

models 1151 and 1152 Pressure'ransmitters with Either "A" or "0" Output Codes," has been reviewed for application to our Nuclear Project Number 2 (WNP-2).

The Supply System's design for WNP-2 includes two safety-related process RIoni ioring 'ioops utilizing the subject transmitters which could experience a greater than 1405 over-range condition:

o The low range containment pressure transmitters, which have a maxiII;uIII range of 10 psia to 5.4 psig, may experience a greater than 140il over-, range condition following a loss of coolant accident.

However, by procedure, the control room operators will not rely on the lower range pressure indication, but will observe a medium range (0 to 70 psig) instrument.

o The main steam isolation valve leakage controI system header pressure transmitters, which have a maximum range of 0 to 100 psig, will be exposed to approximately 1000 psig during n'ormal operation. Again by procedure, the information provided by this indication will not be utilized by the operators until the reactor low pressure permissive annunciator is received,(at less than 35 psig), indicating the system may be initiated.

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To prevent ambiguous transmitter output signals during the above over-ranging conditions, the Supply System will convert the transmitters to "E" output code models by installing .new circuit boards recommended by the manufacturer. The modification is scheduled for completion prior to July, 1981.

Approximately one-man week was expended in preparing this response.

Very truly yours, D. L. Renberger Assistant Director, Technology cc: Office of l&E, Division of RCI--L!ashington, D.C.

W. ';loods, tlUS i'l. S. Reynolds, 08L