ML20071F284

Forwards Replacement PSAR P 9.4-1 for Recently Issued Amend 76

ML20071F284
Person / Time
Site:	Clinch River
Issue date:	03/02/1983
From:	Rando J BURNS & ROE CO.
To:	NRC
References
NUDOCS 8303150479
Download: ML20071F284 (2)

Text

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yV2av March 2, 1983 TO: .CRBRP PSAR SET HOLDERS FROM: J. G. .Rando .

Burns and. Roe, Inc. j'U - 0 d PSAR Coordinator Attached page is being provided to replace PSAR page number 9.4-1 which was recently issued with PSAR Amendment 76.

A printing error was discovered while incorporating Amendment 76 into the PSAR in that page number 9.4-la was inadvertently not printed on the reverse side of page number 9.4-1. Kindly discard FSAR page 9.4-1 issued with the Amendment 76 packet and replace with page 9.4-1 and 9.4-la attached.

Should there be any questions regarding the above, I can be contacted at telephone number 201-265-2000 Extension 3545.

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PDR ADOCK 05000537 A PDR f s

o 9.4 PIPING AND EQUIPMENT ELECTRICAL HEATING

9. 4.1 Desien Basis The piping and Equipment Electrical Heating System provides the electrical heaters, electrical heater mounting hardware, heater power controllers and the related temperature measuring cnd controlling instrumentation and equipment required to heat the following sodium containing process systems and components:

Reactor Enclosure

• Reactor Refueling (Storage Tank)

Reactor Heat Transport (Primary and intermediate) Systems Steam Generation System (Dump Tanks and Sodium Water Reaction Product Tanks)

Auxiilary Liquid Metal System Inert Gas Receiving and Processing System Sodl un impurity Monitoring System This heat is required to preheat these sodium process systems prior to fili, to prevent sodiun freezing when system heat sources such as reactor decay heat and punping heat become insuf ficient, and to maintain pre-established temperature dif ferences in the system.

To perform the dry heat-up f unction, the Electrical Heating System shall be capable of preheating the sodium process systems from anblent temperature to p any temperature between ambient and a maximum of approximately 4500F before Q the system is filled with sodlun. The heating requirements for each trace heated component in the above systems will be determined by the particular sodlun process system.

The Electrical Heating System shall also be capable of providing the applicable heatup rate for the particular system or components when filled wIth sodiun and of holding process system temperatures when filled with sodiun. Heat provided by this system can be used to melt f rozen sodiun in piping or components. Freezing of sodium in major systems or components is considered uniIkely and is an abnormal event.

The temperatures of all measured points shall be indicated locally and in the Main Control Room. The thermocouple used for monito 'ng shall be separate f rcrn the thermocoupl e used f or control . Thermocoupi et ieads as a matter of good design practice shall use dif ferent paths f rom heater power conductors.

l The electrical heating, temperature monitoring, and temperature control lines I are al l non-saf ety-rel ated. As such, the electrical heating, monitoring, and

! control lines shall be separated from all Class IE lines per IEEE Std.

b 384-1981.

l All piping and equipment in inaccessible areas shall be provided with spare heaters and thermocoupl es. The spares shall be accessible in a junction box in a man-saf e location. All heater circuits shall be provided with ground fault protection. AlI instruments and controls shalI be testable in place.

p *The Trace Heating System which services the reactor vessel he"d, control rod g drive lines, and vessel support area is discussed in Section 5.2.1.6.

9.4-1 Amend. 75 Feb. 1983

s Technical Specifications will be provided in the FSAR for the ;peration, as appropriate, of trace heated safety related equipment to consider thermocouple and heater malfunctions.

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' O Amend. 76 9.4-la March 1983