ML050260389

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TS Pages for Nine Mile Point, Unit 1
ML050260389
Person / Time
Site: Nine Mile Point Constellation icon.png
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 Instrument Instrument Channel Parameter Sensor Check Channel Test Calibration (8) Shutdown Position of None Once during each major None Reactor Mode Switch refueling outage (9) Neutron Flux (a) IRM (i) Upscale Once per shift(f Once per week(9) Once per operating cycle(n) I (ii) Inoperative Once per shift(§) Once per week(9) Once per operating cycle(n) I (b) APRM (i) Upscale None Once per 3 months Once per week(m)

Once per 3 months~n) I (ii) Inoperative None Once per 3 months None (10) Turbine Stop Valve None Once per 3 months Once per operating cycle Closure (11) Generator Load None Once per 3 months Once per 3 months Rejection 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 Operable Instrument Reactor Mode Switch Minimum No. Channels per Position in Which of Tripped or Operable Function Must Be Parameter Operable Trip Systems Trip System (I) Set Point Operable 0.

t3 4..

Co Cl)

(1) Deleted I (2) IRM

a. Detector not in Startup Position 2 3(b) x x
b. Inoperative 2 3(b) x x 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 Operable Instrument Reactor Mode Switch Minimum No. Channels per Position In Which of Tripped or Operable Function Must Be Parameter Operable Trip Systems Trip System Set Point Operable C

13 0 _ - 0.

oM W-a) uz a)

CO .4-(4) Deleted (5) Refuel Platform and Hoists 2(f) I x (6) Mode Switch in Shutdown I 1 x (7) Mode Switch In Refuel I 1 x (Blocks withdrawal of more than I rod)

(8) Deleted 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 Instrument Instrument Channel Parameter Sensor Check Channel Test Calibration (1) Deleted I (2) IRM

a. Detector not in N/A Once per week(g) N/A Startup Position
b. Inoperative N/A Once per week(g) N/A C. Downscale N/A Once per week(g) Once per operating cycleU)
d. Upscale N/A Once per week(g) Once per operating cycle0 )

(3) APF IM

a. Inoperative None Once per 3 months None
b. Upscale (Biased by None Once per 3 months Once per 3 monthso)

Recirculation Flow)

c. Downscale None Once per 3 months Once per 3 monthso)

(4) Deleted AMENDMENT NO. 442, 186 230

TABLE 4.6.2g (cont'd)

INSTRUMENTATION THAT INITIATES CONTROL ROD WITHDRAWAL BLOCK Surveillance Requirement Instrument Instrument Channel Parameter Sensor Check Channel Test Calibration (5) Refuel Platform and (see 4.5.2)

Hoists (6) Mode Switch in Once during each major Shutdown refueling outage (7) Mode Switch in Once during each major Refuel (Blocks refueling outage withdrawal of more than 1 rod)

(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