ML20024B693
| ML20024B693 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/29/1983 |
| From: | SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | |
| Shared Package | |
| ML20024B691 | List: |
| References | |
| TAC-52607, NUDOCS 8307110237 | |
| Download: ML20024B693 (1) | |
Text
RANCHO SECO UNIT 1 TECHNICAL SPEC FICATIONS Surveillance 5:andards Calib racion Calibration shall be perfor=ed to assure the presen ation and acquisition Tac nuclear flux (power range) channels a=:lifiers of accurate information.
shall be calibrated against a heat balance standard when the core thermal power flo' ca l i b ra t ion is exceeds the indicated neutron power by more than two percent, requi red when indicated neutron power exceeds core thermal power, because this 94 would be a conservative deviation.
8 Chtnnels subject only :o "drif:" errors induced within :he instru=entation 1:relf and consequen:ly, can colerate longer intervals between calibrations.
Process system instru=en:ation errors induced by drif t can be expec.:ed to
- he inter-r x.ain wi:hin acceptable tolerances if recalibration is perfor=ed at vals of each refueling period.
Substanlial calibration shif:s within a channel' (essentially a channel failure) will be revealed during routine checking and testing procedures.
forth are considered acceptable.
Thus, minimum calibration frequencies set Teating Th3 frequency of on-line :esting of reactor protective channels as shown in table 4.1-1 will assure the required level of performance.
The equipment testing and system :sazcpling frequencies specified "in cable 4.1-2 and table 4.1-3 are considered adequate ce naintain :he equipment and systems in a safe operational status.(1)
Pcwer Distribution Mapping The incere instrumentation detector' system will provide,a neans of assuring that axial
- and radial power peaks and the peak locations are being controlled by the provisions of the Technical Specification within :he limits employed in the safety snalysis.
REFERENCES (1)
FSAR paragraph L.4.12.
I 8307110237 830629 PDR ADOCK 05000312 P
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