ML050260389
| ML050260389 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 01/25/2005 |
| From: | NRC/NRR/DLPM |
| To: | |
| References | |
| TAC MC2734 | |
| Download: ML050260389 (9) | |
Text
TABLE 4.6.2a (cont'd)
INSTRUMENTATION THAT INITIATES SCRAM Surveillance Requirement Parameter (8)
Shutdown Position of Reactor Mode Switch (9)
Neutron Flux (a) IRM (i)
Upscale (ii)
Inoperative (b)
APRM (i)
Upscale (ii)
Inoperative (10) Turbine Stop Valve Closure (11)
Generator Load Rejection Sensor Check None Once per shift(f Once per shift(§)
None None None None Instrument Channel Test Once during each major refueling outage Once per week(9)
Once per week(9)
Once per 3 months Once per 3 months Once per 3 months Once per 3 months Instrument Channel Calibration None Once per operating cycle(n)
Once per operating cycle(n)
Once per week(m)
Once per 3 months~n)
None Once per operating cycle Once per 3 months I
I I
AMENDMENT NO. 442,453, 186 202
NOTES FOR TABLES 3.6.2a and 4.6.2a (a)
May be bypassed when necessary for containment inerting.
(b)
May be bypassed in the refuel and shutdown positions of the reactor mode switch with a keylock switch.
(c)
May be bypassed in the refuel and startup positions of the reactor mode switch when reactor pressure is less than 600 psi, or for the purpose of performing reactor coolant system pressure testing and/or control rod scram time testing with the reactor mode switch in the refuel position.
(d)
No more than one of the four IRM inputs to each trip system shall be bypassed.
(e)
No more than two C or D level LPRM inputs to an APRM shall be bypassed and only four LPRM inputs to an APRM shall be bypassed in order for the APRM to be considered operable. No more than one of the four APRM inputs to each trip system shall be bypassed provided that the APRM in the other instrument channel in the same core quadrant is not bypassed. A Traversing In-Core Probe (TIP) chamber may be used as a substitute APRM input if the TIP is positioned in close proximity to the failed LPRM it is replacing.
(f)
Verify SRM/IRM channels overlap during startup after the mode switch has been placed in startup. Verify IRM/APRM channels overlap at least 1/2 decade during entry into startup from run (normal shutdown) if not performed within the previous 7 days.
(g)
Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> before startup, if not performed within the previous 7 days. Not required to be performed during shutdown until 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after entering startup from run.
(h)
Each of the four isolation valves has two limit switches. Each limit switch provides input to one of two instrument channels in a single trip system.
(i)
May be bypassed when reactor power level is below 45%.
(j)
Trip upon loss of oil pressure to the acceleration relay.
(k)
May be bypassed when placing the reactor mode switch In the SHUTDOWN position and all control rods are fully inserted.
(I)
Only the trip circuit will be calibrated and tested at the frequencies specified in Table 4.6.2a, the primary sensor will be calibrated and tested once per operating cycle.
(m)
This calibration shall consist of the adjustment of the APRM channel to conform to the power values calculated by a heat balance during reactor operation when THERMAL POWER 2 25% of RATED THERMAL POWER. Adjust the APRM channel if the difference is greater than +2.0/-1.9% of RATED THERMAL POWER. Any APRM channel gain adjustment made in compliance with Specification 2.1.2a shall not be included in determining the difference.
(n)
Neutron detectors are excluded.
AMENDMENT NO. 442,4434,53, 468 186 203
TABLE 3.6.2g INSTRUMENTATION THAT INITIATES CONTROL ROD WITHDRAWAL BLOCK Limiting Condition for Operation Minimum No.
of Tripped or Operable Trip Systems Minimum No. of Operable Instrument Channels per Operable Trip System (I)
Reactor Mode Switch Position in Which Function Must Be Operable Parameter Set Point Cl) 0.
t3 4..
Co (1)
Deleted (2)
- a.
Detector not in Startup Position
- b.
Inoperative I
2 3(b) 3(b) x x
x x
2 AMENDMENT NO. 442, 186 226
TABLE 3.6.2g (cont'd)
INSTRUMENTATION THAT INITIATES CONTROL ROD WITHDRAWAL BLOCK Limiting Condition for Operation Minimum No.
of Tripped or Operable Trip Systems Minimum No. of Operable Instrument Channels per Operable Trip System Reactor Mode Switch Position In Which Function Must Be Operable Parameter Set Point C
013 W-CO 0.
oM a) uz
.4-a)
(4)
Deleted (5)
Refuel Platform and Hoists (6)
Mode Switch in Shutdown (7)
Mode Switch In Refuel (Blocks withdrawal of more than I rod)
(8)
Deleted 2(f)
I x
I 1
x I
1 x
I AMENDMENT NO. 44A 186 228 228
PAGE 229 DELETED I
AMENDMENT NO. 442T 186 229
TABLE 4.6.2g INSTRUMENTATION THAT INITIATES CONTROL ROD WITHDRAWAL BLOCK Surveillance Requirement (1)
(2)
Parameter Deleted IRM Sensor Check Instrument Channel Test I
Instrument Channel Calibration a.
b.
C.
d.
(3)
APF Detector not in Startup Position Inoperative Downscale Upscale IM N/A N/A N/A N/A Once per week(g)
Once per week(g)
Once per week(g)
Once per week(g)
N/A N/A Once per operating cycleU)
Once per operating cycle0)
- a. Inoperative
- b. Upscale (Biased by Recirculation Flow)
- c.
Downscale (4)
Deleted None None None Once per 3 months Once per 3 months Once per 3 months None Once per 3 monthso)
Once per 3 monthso)
AMENDMENT NO. 442, 186 230
TABLE 4.6.2g (cont'd)
INSTRUMENTATION THAT INITIATES CONTROL ROD WITHDRAWAL BLOCK Surveillance Requirement Parameter Sensor Check Instrument Channel Test Instrument Channel Calibration (5)
Refuel Platform and Hoists (see 4.5.2)
(6)
Mode Switch in Shutdown Once during each major refueling outage (7)
Mode Switch in Refuel (Blocks withdrawal of more than 1 rod)
Once during each major refueling outage (8)
Deleted I
AMENDMENT NO. 442, 186 231
NOTES FOR TABLES 3.6.2g and 4.6.2g (a)
Deleted (b)
No more than one of the four IRM inputs to each instrument channel shall be bypassed. These signals may be bypassed when the APRMs are onscale.
(c)
No more than one of the four APRM inputs to each instrument channel shall be bypassed provided that the APRM in the other instrument channel in the same core quadrant is not bypassed. No more than two C or D level LPRM inputs to an APRM shall be bypassed and only four LPRM inputs to only one APRM shall be bypassed in order for the APRM to be considered operable. In the Run mode of operation, bypass of two chambers from one radial core location in any one APRM shall cause that APRM to be considered inoperative. A Travelling In-Core Probe (TIP) chamber may be used as a substitute APRM input if the TIP is positioned in close proximity to the failed LPRM it is replacing. If one APRM in a quadrant is bypassed and meets all requirements for operability with the exception of the requirement of at least one operable chamber at each radial location, it may be returned to service and the other APRM in that quadrant may be removed from service for test and/or calibration only if no control rod is withdrawn during the calibration and/or test.
(d)
May be bypassed in the startup and refuel positions of the reactor mode switch when the IRMs are onscale.
(e)
Deleted (f)
One sensor provides input to each of two instrument channels. Each instrument channel is in a separate trip system.
(g)
Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> before startup, if not performed within the previous 7 days. Not required to be performed during shutdown until 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after entering startup from run.
(h)
The actuation of either or both trip systems will result in a rod block.
(i)
A channel may be placed in an inoperable status for up to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> for required surveillance without placing the Trip System in the tripped condition, provided at least one other operable channel in the same Trip System is monitoring that Parameter.
(j)
Neutron detectors are excluded.
AMENDMENT NO. 44227 186 232
PAGE 233 DELETED I
AMENDMENT NO. 442, 186 233