ML20154E417
| ML20154E417 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 10/06/1998 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20154E412 | List: |
| References | |
| NUDOCS 9810080176 | |
| Download: ML20154E417 (8) | |
Text
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REACTIVITY CONTROL SYSTEMS' MDDERATOR TEMPERATURE COEFFICIENT LIMITING CONDITION FOR OPERATION 3.1.1.3 The moderator temperature coefficient (MTC) shall be within the limits specified in the COLR.
The maximum upper design limit shall oe:
Less positive than 0.5 x 10 delta k/k/*F whenever THERMAL POWER is a.
s70% RATED THERMAL POWER, and b.
Less positive' than 0.0 x 10 delta k/k/*F whenever THERMAL POWER is
>70% RATED THERMAL POWER.
APPLICABILITY:
MODES I and 2*#
l ACTION:
i With the moderator temperature coefficient outside any one of the above limits, be in at least HOT STAND 8Y within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
SURVEILLANCE REQUIREMENTS 4.1.1.3.1 The MTC shall be determined to be within its limits by confirmatory measurements.
MTC measured values shall be extrapolated and/or compensated to permit direct comparison with the above limits.
4.1.1.3.2 The MTC shall be determined at the following frequencies and THERMAL POWER conditions during each fuel cycle:
Prior to initial operation above 5% of RATED THERMAL POWER, after" a.
each fuel loading.
b.
At greater than 15% of RATED THERMAL POWER, prior to reaching 40 EFPD core burnup.
AtanyTHERMALPOWER,gthin7EFPDofreachingtwo-thirdsof c.
expected core burnup.
l 5)thK greater than or equal to 1.0.
g SpNial Test Exception 3.10.2.
This Surveillance test need not be performed for Cycle 7 9810080176 981006 PDR ADOCK 05 g2 WATERFORD - UNIT 3 3/4 1-4 AMEN 0 MENT N0. 5,15,102.105
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l 3/4.1 REACTIVITY CONTROL SYSTEMS l
j BASES 3/4.1 1.3 MODERATOR TEMPERATURE COEFFICIENT The limitations on moderator temperature coefficient (MTC) are provided i
to ensure that the assumptions used in the accident and transient analysis remain valid through each fuel cycle. The Surveillance Requirements for measurement of the MTC during each fuel I
cycle are adequate to confirm the MTC value smco this coefficient changes slowly due principally to the reduction in RCS boron concentration associated with fuel bumup. The confirmation that the measured MTC value is withm its limit provides assurances that the coefficient will be i
maintained within acceptable values throughout each fuel cycle.
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WATERFORD-UNIT 3 B 3/4 1-1a AMENDMENT NO.141 i
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NPF-38-212 ATTACHMENT B i
PROPOSED SPECIFICATIONS l
~ e REACTIVITY CONTROL SYSTEMS MODERATORTEMPERATURECOEF)ICIENT LIMITING CONDITION FOR OPERATION 3.1.1.3 The moderator temperature coefficient (MTC) shall be within the limits specified in the COLR.
The maximum upper design limit shall oe:
a.
Less positive than 0.5 x 10 delta k/k/*F whenever THERMAL POWER is
)
$705 RATED THERMAL POWER, and j
b.
Less positive than 0.0 x 10 delta k/k/*F whenever THERMAL POWER is
>70% RATED THERMAL POWER.
APPLICABILITY:
MODES 1 and 2 # ( 0 (2) l AGIIM:
With the moderator temperature coefficient outside any one of the above limits, be in at least H0T STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
SURVEILLANCE REQUIREMENTS i
1 4.1.1.3.1 The MTC shall be determined to be within its limits by confirmatory measurements.
MTC measured values shall be extrapolated and/or compensated to permit direct comparison with the above limits.
4.1.1.3.2 The MTC shall be determined at the following frequencies and THERMAL POWER conditions during each fuel cycle:
Prior to initial operation above 55 of RATED THERMAL POWER, after' a.
4 each fuel loading.
b.
At greater than 155 of RATED THERMAL POWER, prior to reaching 40 EFP0 core burnup.
+
c.
-At any THERMAL POWER, in 7 EFPD of reaching two-thirds of expected core burnup (I) l J
(/) AW th K,,ial Test Exception 3.10.2.
greater than or equal to 1.0.
(1)
Spec
,;,;; trveilh=e test r.=d cet be-perfeind fer CycleW D)
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i WATERFORD - UNIT 3 3/4 1-4 AMEN 0 MENT NO. 5,15,102,105 w
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INSERT 1
~ The MTC determination of Paragraph 4.1.1.3.2.c is not required if the results of the i
tests required in surveillance 4.1.1.3.2.a and 4.1.1.3.2.b are within a tolerance of 4
- 0.16X10 delta k/k/*F from the corresponding design values.
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o 3/41 REACTMTY CONTROL SYSTEMS BASES 3/4.11.3 MODERATOR TEMPERATURE COEFFICIENT The limitations on moderator temperature coefficient (MTC) are provided to ensure that the assumptions used in the accident and transient analysis remain valid through w_.._._...
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WATERFORD-UNIT 3 8 3/4 1 1a AMENDMENT NO.141 T
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INSERT 2 The Surveillance Requirements consisting of beginning of cycle measurements, plant parameter monitoring, and end of cycle MTC predictions ensures that the MTC remains within ur.eptable values. The confirmation that the measured values are within a tolerance of t0.16X104 delta k/k/*F from the corresponding design values prior to 5%
power and 40 EFPD provides assurances that the MTC will be maintained within acceptable values throughout each fuel cycle. CE NPSD 911 and CE NPSD 911 Amendment 1, " Analysis of Moderator Temperature Coefficients in Support of a Change in The Technical Specifications End of Cycle Negative MTC Limit", provide the analysis that established the design margin of *0.16X104 delta k/k/* F.
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NPF-38-212 ATTACHMENT C CE NPSD-911, Amendment 1 J