ML20041C327
| ML20041C327 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 02/25/1982 |
| From: | YANKEE ATOMIC ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20041C322 | List: |
| References | |
| NUDOCS 8203010168 | |
| Download: ML20041C327 (4) | |
Text
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1 POUER DISTRIBUTION LIMITS SURVEILLANCE REQUIREMENTS (Continued) 4.2.1.2 The below factors shall be included in the calculation of peak full power LHCR:
fluxpowerpeakingfactor,Fy,measuredusingincore a.
Heat instrumentation at a power 2 10%.
b.
Effect of inserting the control group f rom its position at the time
[
of measurement to its insertion limit, F1 as shown in Figure l
3.2-2.
The rod insertion limit is shown in Figure 3.1-1.
The multiplier for xenon redistribution is a function of core c.
lifetime as given in Figure 3.2-3.
In addition, if control rod Group C is inserted below 75 inches, allowable power may not be regained until power has been at a reduced level defined below for at least twenty-four hours with control rod Group C between 75 and 90 inches.
Reduced power = allowable fraction of full power times multiplier given in Figure 3.2-4.
Except, ions:
1.
If the rods are inserted below 75 inches and power does not go below the reduced power calculated above, hold at the lowest attained power level for at least twenty-four hours with control rod Group C between 75 and 90 inches before returning to allowable power.
2.
If the rods are inserted below 75 inches and
(
zero power is held for more than fourty-eight hours, no reduced power level need be held on the way to the allowable fraction of full power.
d.
Shortened stack height factor, 1.009.
e.
Measurement uncertainty:
1.
1.05, when at least 17 incore detection system neutron detector thimbles are OPERABLE, or 2.a.
1.068, when less than 17 incore detection system neutron detector thimbles are OPERABLE, or b.
1.080, when less than 12 incore detection system neutron detection thimbles are OPERABLE.
YANKEE-ROWE 3/4 2-2 Amendment 43, 53 1
8203010168 820225 PDR ADOCK 05000029 P
POWER DISTRIBUTION LIMITS SURVEILLANCE REQUIREMENTS 4.2.2.1 F shall be determined to be within its limit by:
q a.
Using the movable incore detectors to obtain a power distribution map:
1.
Prior to initial operation above 75% of RATED THERMAL POWER after each fuel loading, and 2.
At least once per 1000 Effective Full Power Hours.
b.
Increasing the measured F component of the power distribution map q
by:
1.
4% to account for engineering tolerances, 2.
5%, when at least 17 incore detection system neutron detector thimbles are OPERABLE, to account for measurement uncertainty, 3.a.
6.8%, when less than 17 incore detection system neutron i
detector thimbles are OPERABLE, to account for measurement uncertainty, b.
8.0%, when less than 12 incore detection system neutron detector thimbles are OPERABLE, to account for measurement uncertainty, and 4.
3% to account for fuel densification.
2 4.2.2.2 When F is measured pursuant to Specification 4.10.2.2, an overall q
measured F chaIl be obtained from a power distribution map and increased by:
q 1.
4% to account for engineering tolerances, i
i 2.
5%, when at least 17 incore detection system neutron detector thimbles are OPERABLE, to account for measurement uncertainty, 3.a.
6.8%, when less than 17 incore detection system neutron detector thimbles are OPERABLE, to account for measurement uncertainty, b.
8.0%, when less than 12 incore detection system neutron j
detector thimbles are OPERABLE, to account for measurement uncertainty, and f
4.
3% to account for fuel densification.
4.2.2.3 The provisions of Specification 4.0.4 are not applicable.
l YANKEE-ROWE 3/4 2-9 Amendment No. 53 t
l l
POWER DISTRIBUTION LIMITS SURVEILLANCE REQUIREMENTS Ffg shall be determined to be within its limit by using the movable 4.2.3.1 incore detectors to obtain a power distribution map:
a.
Prior to operation above 75% RATED THERMAL POWER af ter each fuel loading, and b.
At least once per 1000 Effective Full Power Hours.
c.
The provisions of Specification 4.0.4 are not applicable.
4.2.3.2 ThemeasuredFfH f 4.2.3.1 above shall be increased, for measurement l
uncertainty, by:
I a.
5%, when at least 17 incore detection system neutron detector thimbles are OPERABLE, or b.
6.8%, when less than 17 incore detection system neutron detector thimbles are OPERABLE, or c.
8.0%, when less than 12 incore detection system neutron detector thimbles are OPERABLE.
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YANKEE-ROWE 3/4 2-11 Amendment No. 43, 53
_ _ _.= _..
INSTRUMENTATION INCORE DETECTION SYSTEM 3
LIMITING CONDITION FOR OPERATION 3.3.3.2 The incore detection system shall be OPERABLE with?
4 a.
At least twelve (12) neutron detector thimbles OPERABLE, a
i b.
A minimum of two (2) OPERABLE neutron detector thimbles per core quadrant, 1
c.
Sufficient OPERABLE movable neutron detectors, drive, and l
readout equipment to map these thimbles, and d.
At least ten (10) OPERABLE radial position thermocouples with j
an OPERABLE thermocouple in at least one of the two calculated hottest instrumented fuel assemblies.
l EXCEPTION:
For Cycle 15, Items a. and b. above are not required if operation is at or beyond 4000 MWD /MTU. Ilowever, there should be at least nine (9) detector thimbles OPERABLE and a minimum of one (1) OPERABLE neutron detector thimbles per quadrant.
I
{
APPLICABILITY: When the incore detection system is used for core power i
distribution measurements.
ACTION:
With the incore detection system inoperable, do not use the system for the above applicable monitoring or calibration functions. The provisions of Specifications 3.0.3 and 3.0.4 are not applicable.
i 1
SURVEILLA'JCE REQUIREMENTS 4.3.3.2 The incore neutron detectors shall be demonstrated OPERABLE by normalizing each detector output to be used within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to its use for core power distribution measurements.
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YANKEE-ROWE 3/4 3-23 i
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