ML20212F036
| ML20212F036 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 12/30/1986 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML20212F028 | List: |
| References | |
| NUDOCS 8701050564 | |
| Download: ML20212F036 (2) | |
Text
,
ATTACHMENT Consumers Power Company Big Rock Point Plant Docket 50-155 PROPOSED TECHNICAL SPECIFICATION PAGE CHANGES December 30, 1986 8701050564 861230 PDR ADOCK 05000155 P
PDR 1 Pages AT1286-0205-NLO2
47 5.2.2 Control Rod System (Contd) rods. Evaluation of this requirement.shall be based on previous experimental measurements.
(g) Minimum Accuracy of Rod Position Indicating System The control rod drive positions itself in-23 discrete positions over its travel. The position indicating system is of a digital readout design and indicates the drive position over a range of 1.5 inches for each position of the drive. Control rods shall not be allowed to remain in position where the indication is not operable.
If all indication for a particular control rod is lost, the rod shall not be moved until the indication has been restored, except for scram.
(h) Operation of the Scram Dump Tank Valves and High Level Alarm The scram dump tank air operated vent and drain valves shall be
[
(1) verified open at least once per 31 days, and (2) cycled through at least one complete cycle of full travel once per quarter. These valves may be closed intermittently for testing under administrative controls. At every refueling outage, the valves shall be tested to close within 20 seconds of receipt of a scram signal and the scram dump tank high level alarm shall be verified operable at a level of 10 1/2 inch below the tank centerline. An unexplained high level alarm shall require immediate investigation and if not corrected, subsequent insertion of all or all but one control rod drive within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
i 5.2.3 Liquid Poison System The liquid poison system shall be available for operation at all times during refueling and power operation. The reactor shall be I
shutdown in any situation where the poison solution tank level drops below and equivalent of 850 gallons 19 weight percent sodium h.
pentaborate or where the poison solution storage temperature drops to less than 5'F above saturation temperature. The maximum
(
allowable concentration shall be 30 weight percent of sodium j
pentaborate. The minimum worth of the liquid poison system (based on normal water level) shall be 25% Ak Components of thesystemshallbecheckedatonetotwomonIkf.
6 intervals for proper operation except for actuation of the injection valves.
j The liquid poison system shall be used at any time when suberiticality cannot be assured by the normal shutdown mechanism.
Injection shall be continued until a minimum shutdown is assured in the most reactive core.
Thereactorshall*kke/kIk'operatedafterpoisonhasbeeninjected margin of 0.01 Ak l
l until the boron r
Proposed TSB1286-0180-NLO4 l
-, _ _ _ _ _ _, _. -