ML20083D878

Proposed Tech Spec Table 3.3.6-2 Re Control Rod Block Instrumentation Setpoints

ML20083D878
Person / Time
Site:	Fermi
Issue date:	09/24/1991
From:	DETROIT EDISON CO.
To:
Shared Package
ML20083D876	List: ML20083D878 NRC-91-0119, Application for Amend to License NPF-43,changing Tech Specs to Revise Instrumentation Setpoints for Rod Block Monitor Downscale Trip Function
References
NUDOCS 9110020004
Download: ML20083D878 (1)

Text

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TABLE 3.3.6

• CONTROL R0D BLOCK INSTRUMENTATION SETPOINTS  ;

E TRIP FUNCTION TRIP SETPOINT ALLOWABLE VALUE mye ~ 1. R00 BLOCK MONITOR i g; '

a. Upscale As specified in the As specified in the o E CORE OPERATING CORE OPERATING 38 5 LIMITS REPORT LIMITS REPORT 88 m g b. Inoperative NA NA 33 c. Downscale 2 94% of Reference Level 2 92.3% of Reference Level 1.

oo no m5to 2. APRM

@T** a. Flow Biased Neutron Flux - High

- 1) During two recirculation s 0.66 W + 58%* $ 0.66 W + 61%*

loop operation with a maximum of with a maximum of 108% 110%

w 2) During single recirculation s 0.66 W + 52.7%#* 5 0.66 W + 55.7%#*

1 loop operation w b. Inoperative NA NA 1 c. Downscale > 5% of RATED THERMAL POWER > 3% of RATED THERMAL POWER

• Neutron Flux - Upscale, Setdown

d. 512%ofRATEDTHERMALPOWER i14%ofRATEDTHERMALPOWER

3. SOURCE RANGE MONITORS

a. Detector not full in NA NA

b. Upscale 1 1.0 x 105 cps s 1.6 x 105 cps ,

c. Inoperative NA NA

> d. Downscale 2 3 cps ** 2 2 cps **

M a

@ *The APRM rod block function is varied as a function of rectreulation icop drive flow (W). t

• • May be reduced to 3 0.7 cps provided the signal-to-noise ratio 3 20.

. PDuring single recirculation loop operation, rather than adjusting the APRM Flew Biased setpoints to cor'ely with the sirgle loop values the gain of h the APRus may be adjusted for a period not to exceed 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> such that the final APEM readings are at least 5.3% of rated power greater than 100%

-- times FRTP. provided that the adjusted APRM readings do not exceed 100% of RATED THERMAL PCWER and a notice of adjustmer:t is posted on the reactor n ecntrol parel.

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