ML18051B269

Proposed Changes to Tech Spec 3.1.3 Establishing Time Constraint to Meet Min Conditions for Criticality

ML18051B269
Person / Time
Site:	Palisades
Issue date:	02/05/1985
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18051B267	List: ML18051B266 ML18051B269
References
NUDOCS 8502120275
Download: ML18051B269 (2)

Text

PROPOSED PAGES PROPOSED TECHNICAL SPECIFICATION CHANGE REQUEST MINIMUM CONDITIONS FOR CRITICALITY CONSUMERS POWER COMPANY PALISADES PLANT 255 1 Page r~~~*~Q.5~0~2~1~2~0~2~7~5~8~5~0~2~0~5~~-~

PDR ADOCK 05000255 PDR 1 TS1184-0001B-NL02

' *3 .1. 2 Heatup and Cooldown Rates (Contd)

References (Contd)

(S) FSAR, Section 4.2.4.

(6) US Nuclear Regulatory Commission, Regulatory Guide 1.99, "Effects of Residual Elements on Predicted Radiation Damage to Reactor Vessel Materials", July 197S.

(7) ASME B9iler and Pressure Vessel Code,Section III, Appendix G, "Protection Against Non-Ductile Failure", 1974, Edition.

(8) US Atomic Energy Commission Standard Review Plan, Directorate of Licensing, Section S.3.2, "Pressure-Temperature Limits".

(9) 10 CFR Part SO, Appendix G, "Fracture Toughness Requirements",

August 31, 1973.

3.1. 3 Minimum Conditions for Criticality a) Except during low-power physics test, the reactor shall not be made critical if the primary coolant temperature is below S2S°F.

b) In no case shall the reactor be made critical if the primary coolant temperature is below 286°F.

c) With the primary coolant temperature below the minimum temperature specified in "a" above, restore the primary coolant temperature to within its limit within lS minutes, or the reactor shall be subcritical by an amount equal to or greater than the potential reactivity insertion due to depressurization within the next lS minutes.

d) No more than one control rod at a time shall be exercised or withdrawn until after a steam bubble and normal water level are established in the pressurizer.

e) Primary coolant boron concentration shall not be reduced until after a steam bubble and normal water level are *established in the pressurizer.

Basis At the beginning of the life of the initial fuel cycle, the moderator temperature coefficient is expected to be slightly negative at operating temperatures with all control rods withdrawn. (l) However, the uncertainty of the calculation is such that it is possible that a slightly positive coefficient could exist.

Amendment No SS March 6, 1980 3-12 TS1184-0001A-LI01