ML20206E297

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Rev 1 to Millstone Nuclear Power Station,Unit 2 COLR - Cycle 13
ML20206E297
Person / Time
Site: Millstone Dominion icon.png
Issue date: 04/30/1999
From:
NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20206E289 List:
References
NUDOCS 9905050074
Download: ML20206E297 (8)
v • d • e


Text

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Docket No. 50-336

.Q17750 Attachment 1 Millstone Nuclear Power Station Unit No. 2 Core Operating Limits Report - Cycle 13, Revision 1 i

April 1999 9905050074 990427  !

PDR ADOCK 05000336  :

P PDR {

2.0 - CORE OPERATING LIMITS REPORT. CYCLE 13 1.. CORE OPERATING LIMITS REPORT This Core Operating Limits Report for Millstone 2 has been prepared in accordance with the requirements of Technical Specification 6.9.1.8. The Technical Specifications affected by this l%N  !

report are listed below-.

l Section Specification  !

2.1 3/4.1.1.1 SHUTDOWN MARGIN - Tm > 200*F 2.2 3/4.1.1.2 SHUTDOWN MARGIN - T.;g 5 200*F l

2.3 3/4.1.1.4 Moderator Temperature Coefficient 2.4 3/4.1.3.6 Regulating CEA Insertion Limits 2.5 3/4.2.1 Linear Heat Rate 2.6 3/4.2.3 TOTAL UNRODDED INTEGRATED RADIAL PEAKING FACTOR - F/

2.7 3/4.2.6 DNB Margin Terms appearing in capitalized type are DEFINED TERMS as defined in Section 1.0 of the Technical Specifications.

2.0 OPERATING LIMITS '

The cycle-specific parameter limits for the specifications listed in Section 1.0 are presented in the following subsections. These limits have been developed using the NRC-approved methodologies specified in Technical Specification 6.9.1.8.b. lfH 2.1 SHUTDOWN MARGIN - Tm > 200*F (Specification 3/4.1.1.1)

The SHUTDOWN MARGIN shall be13.6% AK/K 2.2 SHUTDOWN MARGIN - Ty 5 200*F (Specification 3/4.1.1.2)

The SHUTDOWN MARGIN shall be 13.6% AK/K 2.3 Moderator Temperature Coefficient (Specification 3/4.1.1.4) i The moderator temperature coefficient shall be:

a. Less positive than 0.7x10" AK/K/*F whenever THERMAL POWER is 5 70% of RATED THERMAL POWER, Millstone Unit No. 2 11. 2 - 1 TRMCR 99-2-1 TRMCR 98-2-14 March 18,1999

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2.0 - CORE OPERATING LIMITS REPORT. CYCLE 13 I

b. Less positive than 0.4X10d AK/K/*F whenever THERMAL POWER is > 70% of  !

RATED THERMAL POWER,

c. Less negative than -2.8x10dAK/K/*F at RATED THERMAL POWER 2.4 Regulating CEA Insertion Limits (Specification 3/4.1.3.6)

The regulating CEA groups shall be limited to the withdrawal sequence and to the  !

insertion limits shown in Figure 2.4-1. CEA insertion between the Long Term Steady State Insertion Limits and the Transient insertion Limits is restricted to:

a. 5 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> per 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> interval,
b. 5 5 Effective Full Power Days per 30 Effective Full Power Day interval, and
c. 514 Effective Full Power Days per calendar year.

2.5 Unear Heat Rate (Specification 3/4.2.1)

The Linear not exceed 14.6heat kw/ft.rate, including heat generated in the fuel, clad and moderatol f

During operation with the linear heat rate being monitored by the Excore Detector Monitoring System, the AXIAL SHAPE INDEX shall remain within the limits of Figure 2.5-1.

During operation with the linear heat rate being monitored by the incore Detector Monitor System, the alarm setpoints shall be adjusted to less than or equal to the limit when the following factors are appropriately included in the setting of the alarms:

1. A measurement-calculational uncertainty factor of 1.07,
2. An engineering uncertainty factor of 1.03, and
3. A THERMAL POWER measurement uncertainty factor of 1.02.

2.6 TOTAL UNRODDED INTEGRATED RADIAL PEAKING FACTOR - F,' (Specification 3/4.2.3)

The calculated value of Fr'shall be < 1.69.

2.6.1. The Power Dependent Fr' limits are shown in Figure 2.6-1.

Millstone Unit No. 2 ~ 11. 2 - 2 TRMCR 99-2-1 TRMCR 98-2-14 March 18,1999

~ '.' 2.0 - CORE OPERATING LIMITS REPORT, CYCLE 13 2.7 DNB Margin (Specification 3/4.2.6) l*3 The DNB margin shall be preserved by maintaining the cold leg temperature, pressurizer pressure, reactor coolant flow rate, and AXIAL SHAPE INDEX within the following limits:

Parameter Limits Four Reactor Coolant Pumos Operations

a. Cold Leg Temperature < 549'F
b. Pressurizer Pressure 2 2225 psia *
c. Reactor Coolant Flow Rate 1360,000 gpm
d. AXIAL SHAPE INDEX FIGURE 2.7-1
  • Limit not applicable during either the THERMAL POWER ramp increase in excess of 5% of ,

RATED THERMAL POWER per minute or a THERMAL POWER step increase of greater -

than 10% of RATED THERMAL POWER.

91-i

. tr N Millstone Unit No. 2 11. 2 - 3 TRMCR 04-2-1 TRMCR 98-2-14 March 18,1999

l 2.0 CORE OPERATING LIMITS REPORT CYCLE 13 l

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FIGURE 2.4-1 CEA Insertion Limit vs. THERMAL POWER With Four Reactor Coolant Pumps Operating TRMCR 99-2-1 Millstone Unit No. 2 II.2-4 March 18,1999

2.0 CORE OPERATING LIMITS REPORT. CYCLE 13 1200 . . . . i,. . . . . . .. .. .. .... ... . .. .. ,. . ,.

UNACCEPTABLE OPERATING REGION -

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FIGURE 2.5-1 AXIAL SHAPE INDEX vs. -

L PERCENT OF ALLOWABLE POWER LEVEL

! TRMCR 99-2-1 Millstone Unit No. 2 . 11. 2 - 5 March 18,1999 l-

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2.0 CORE OPERATING LIMITS REPORT. CYCLE 13 1.2 1.1 1.0 (-0.10,1.0) (0.15,1.0)

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- 0.6 -0.4 -0.2 0 0.2 0.4 0.6 Axial Shape index FIGURE 2.71 AXIAL SHAPE INDEX Operating Limits With Four Reactor Coolant Pumps Operating TRMCR 99-21 Millstone Unit No. 2 11. 2 7 March 18,1999

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