ML20128P926
| ML20128P926 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 02/22/1993 |
| From: | Oconnor P Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20128P932 | List: |
| References | |
| NUDOCS 9302250316 | |
| Download: ML20128P926 (2) | |
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INSTRUMENTATION
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3/4.3.2 ISOLATION ACTUATION INSTRUMENTATION LIMITING CONDITION FOR OPERATION 3.3.2 The isolation actuation instrumentation channels shown in Table 3.3.2 '
shall be OPERABLE with their trip setpoints set consistent with the values sh..n in the Trip Setpoint column of Table 3.3.2-2 and with ISOLATION SYSTEM RESPONSE TIME as shown in Table 3.3.2-3.
APPLICABILITY:
As shown in Table 3.3.2-1.
XCTTON:
a.
With an isolation actuation instrumentation channel trip setpoint less conservative than the value snown in the Allowable Values column of Table 3.3.2-2, declare the channel inoperable until the channel is restored to OPERABLE status with its trip setpoint adjusted consistent with the Trip Setpoint value.
b.
With the number of OPERABLE channels less than required by the minimum OPERABLE channels per trip system requirement for one trip system:
1.
If placir.g the inoperable channel (s) in the tripped condition would cause an isolation, the inoperable channel (s) shall be restored to OPERABLE status within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> or the ACTION required by Table 3.3.2-1 for the affected trip functio. shall be taken.
OR 2.
If placing the inoperable channel (s) in the tripped condition would not cause an isolation, the inoperable channel (s) and/or that trip system shall be placed in the tripped condition within a) 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> for trip functions common to RPS instrumentation #;
and b) 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for trip functions not common to RPS instrumentation #.
c.
With the number of OPERABLE channels less then required by the Minimum OPERABLE Channels per Trip System requirement for ')oth trip systems, place at least one trip system
- in l
the tripped condition within one hour and take the ACTION required by Table 3.3.2-1.
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- Trip functions common to RPS Instrumentation are shown in Table 3.3.2-1.
- Place one trip system (with the most inoperable channels) in the tripped condition. The trip system need not be placed in the tripped condition when this would cause the isolation to occur.
GRAND Gulf-UNIT 1 3/4 3-9 Amendment No.
69, 97 9302250316 930222 PDR ADOCK 05000416 F
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-INSTRUMENTATION-
-3/4.3.2. ISOLATION ACTUATION INSTRUMENTATION SURVEILLANCELREQUIREMENTS 4'3.2.1 Each isolation-actuation instrumentation channel shall be demonstrated OPERABLE by the performance of the CHANNEL CHECK, CHANNEL. FUNCTIONAL TEST and CHANNEL CALIBRATION operations for the OPERATIONAL CONDITIONS and at the frequencies shown in Table 4,3.2.1-1.
4.3.2.2 LOGIC SYSTEM FUNCTIONAL TESTS and simulated automatic operation of all channels shall be performed at least once'per 18 months.
4.3.2.3 The -ISOLATION SYSTEM RESPONSE TIME of each isolation trip function shown in Table 3.3.2-3 shall be demonstrated to be within its limitrat least once per 18 months.
Each test shall include at least one channel per trip system such that all channels are tested at least once every N times 18 months, where N is the total number of redundant channels in a specific isolation trip. system.-
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GRAND GULF-UNIT 1 3/4 3-9a
. Amendment No. 69, 97
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