ML20136A939

Part 21 & Deficiency Rept Re Rev B to Rosemont Instruction Manual 4302 Not Addressing Zero Shift Due to Process Pressure in Model 1153 Alphaline Nuclear Pressure Transmitter

ML20136A939
Person / Time
Site:	Rancho Seco
Issue date:	11/08/1985
From:	Reinaldo Rodriguez SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
REF-PT21-85, REF-PT21-85-480-000 PT21-85-480, PT21-85-480-000, RJR-85-546, NUDOCS 8511200086
Download: ML20136A939 (2)

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g suun SACRAMENTO MUNICIPAL UTILITY DISTRICT C E201 S Street Box 15830. Sacramento California 95M3;(916) 452 3211 eS N.

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G November 8,1985 5

E RJR 85-546 q

E J.B. MARTIN REGION V 0FFICE OF INSPECTION & ENFORCEMENT U.S. NUCLEAR REGULATORY COMMISSION 1450 MARIA LANE, SUITE 210 WALNUT CREEK, CA 95638 10CFR21 NOTIFICATION This is to inform the Nuclear Regulatory Commission, Region V, of the District's decision that the Model 1153, Alphaline Nuclear Pressure Transmitter manufactured by Rosemount Inc. Minneapolis, Minnesota, must be reported as a 10CFR21 deficiency.

The pertinent information required by the regulation is included as attachment No. 1.

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.sy R.J. Rodrig Assistant Geh al Manager, Nuclear Attachment V

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10CFR21 REPORT 1.

INFORMANT:

R.J. Rodriguez Assistant General Manager, Nuclear Sacramento Municipal Utility District 6201 S Street Sacramento, CA 96813 2.

FACILITY:

Rancho Seco Nuclear Power Plant Herald, CA BASIC COMPONENT:

Model 1153 Alphaline Nuclear Pressure Transmitter 3.

BASIC COMPONENT SUPPLIER:

Rosemount, Inc.

Post Office Box 35129 Minneapolis, Minnesota 55435 4.

NATURE OF DEFECT:

The Rosemont Instruction Manual,#4302 Rev. B, Revised 7/82, does not address zero shift due to process pressure.

The Rosemont Performance Specification Report does address zero shift due to process pressure. Because information was not in the technical manual received, it was not incorporated in the calibration procedure.

The specific area of concern is High Pressure Injection Flow, the result being that flow indication less than 100 gpm is questionable.

5.

DATE OF INFORMATION:

November 1985 6.

NUMBER AND LOCATION:

a)

Inside Containment Building OTSGLevel, Ten (10)

Core Flood Tank Level, Four (4)

Pressurizer Level, Three (3) b) Outside Containment Building Aux Feedwater Flows, Four (4)

Cond. Storage Tank Level, Two (2) liigh Press. Inject. Flow, Four (4)

Total Seal Inj. Flow, One (1)

Decay Heat Flow, Two (2) 7.

CORRECTIVE ACTION:

The zero shift due to process pressure will be addressed by calibration procedures.

In the case of HPI with various process pressures will be addressed providing instructions to the operators not to rely on readings below 100 gpm.

Also the calibration pressure was selected on the HPI indicators so that the zero error is caused to be always in a minus direction (Indicated flow is less than actual). On the other flow indicators the District corrected the 7;ro shift due to process pressure at zero differential pressure.

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