ML18102B534

Proposed Tech Specs,Incorporating Plant Computer (P-250) Into TS Bases for Movable Control Assemblies

ML18102B534
Person / Time
Site:	Salem
Issue date:	08/18/1997
From:	Public Service Enterprise Group
To:
Shared Package
ML18102B533	List: ML18102B532 ML18102B534
References
NUDOCS 9708260114
Download: ML18102B534 (2)

Text

• ATTACHMENT 1 REVISED TECHNICAL SPECIFICATION BASES PAGES LICENSE CHANGE REQUEST S97-15B LR-N970532 9708260114 970818 PDR ADOCK 05000311 P PDR

REACTIVITY CONTROL SYSTEMS BASES The ACTION statements which permit limited variation from the basic requirements are accompanied by additional restrictions which ensure that the original crit~ria are met. Mis-alignment of a rod requires measurement of peaking factors or a restriction in THERMAL POWER; either of these restrictions provide assurance of fuel rod integrity during continued operation. The reactivity worth of a mis-aligned rod is limited for the remainder of the fuel cycle to prevent exceeding the assumption used in the accident analysis.

The maximum rod drop time restriction is consistent with the assumed rod drop time used in the accident analyses. Measurement with T >541°F and with all reactor coolant pumps operating ensures that the measu~¥~ drop times will be representative of insertion times experienced during a reactor trip at operating conditions.

Control r9d positions and OPERABILITY of the rod position indicators are required to be verified on a nominal basis of once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> with more frequent verifications required if an automatic monitoring channel is inoperable. These verification frequencies are adequate for assuring that the applicable LCO's are satisfied.

The terms "Shutdown Rod Position Indicator," "Analog Rod Position Indicator," "Control Rod Position Indicator," and "Rod Position Indicator" are all used in this bases section or in Technical Specifications, and all refer to indication driven by the output of the Analog Rod Position Indication (ARPI) system.

One method for determining rod position are the indicators on the control console. An alternate method of determining rod position is the plant computer. Either the control console indicator or plant computer is sufficient to comply with this specification. The plant computer receives the same input from ARPI as the control console indicators and provides resolution equivalent to or better than the control console indicators. The plant computer also provides a digital readout of rod position which eliminates interpolation and parallax errors inherent to analog scales.

SALEM - UNIT 2 B 3/4 1-5 August 13, 1997