Text

Amend 38 to License DPR-58,revising Tech Specs to Allow Operation of Unit W/Exxon Nuclear Co Power Distribution Control Procedures
	ML17319A560
Person / Time
Site:	Cook
Issue date:	07/25/1980
From:	Varga S; Office of Nuclear Reactor Regulation
To:	;
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ML17319A561	List: ML17319A560; ML17319A562; ML17319A563;
References
	NUDOCS 8009050464
	Download: ML17319A560 (18)
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UNITED STATES NUCLEAR R EG ULATORY COMMISSION WASHINGTON, D. C. 20555 INDIANA AND MICHIGAN ELECTRIC COMPANY

'DOCKET NO; 50.-315 DONALD C.

COOK NUCLEAR PLANT UNIT NO.

1 AMENDMENT TO FACILITY OPERATING L'ICENSE

'mendment No. 38 License No.

DPR-58 l.

The Nuclear Regulatory Comission (the Commission) has found that:

The application for amendment by Indiana and Michigan Electric Company (the licensee) dated May 12, 1980, complies with the standards arid requirements of the Atomic Energy Act of 1954, as amended (the Act) and the Comission's rules and regulations set forth in 10 CFR Chapter I; B.

The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Coranission; C.

D.

There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Corrmission's regulations; The issuance of this amendment will,not be inimical to the common defense and security or to the heaith and safety of the public; and The issuance of this amendment is in accordance with 10 CFR Part 51 of. the CoIInIission's regulations and all applicable requirements have been satisfied.

o ooo o 5o /gg

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4 2-Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment, and p'aragraph 2.C. (2) of Facility Operating License No. DPR-58 is hereby amended to read as follows:

(2)

Technical S ecifications The Techni ca 1 Speci ficat ions cont a ined in Appendi ces A and B, as revised through Amendment No. 38, are hereby incorporated in the license.

The licensee sha'll operate the facility in accordance with the Technical Specifications.

3.

This license. amendment is effective as of the date of its issuance.

FOR THE NUCLEAR REGULATORY COMMISSION

arga, Chi teven A.

Operating Reactors B

nch 81 Division of Licensing

Attachment:

Changes to the Technical Specifications Date of Issuance:

July 25, 19QO

~

ATTACHMENT TO LICENSE AMENDMENT AMENDMENT NO.

38TO FACILITY OPERATING LICENSE NO.

DPR-58 DOCKET NO. 50-315 Revise Appendix A-as follows:

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P 3/4 2-1 3/4 2-2 3/4 2-3 3/4 2-4 3/4 2-5 3/4 2-6 3/4 2-7 3/4 2-15 3/4 2-16 3/4 2-17 3/4 2-18 3/4 2-21 B3/4 2-2 B 3/4 2-6 Insert Pa es 3/4 2-1 3/4 2-2 3/4 2-3 3/4 2-4 3/4 2-5 3/4 2-6 3/4 2-7 3/4 2-8a 3/4 2-15 3/4 2-16 3/4 2-17 3/4 2-18 B3/4 2-2 B 3/4 2-6

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POt4ER DISTRIBUTION LIMITS LIMITING CONDITION FOR OPERATION Continued c)

Surveillance testing of the APDMS, may be performed pursuant to Specification 4.3.3.6.1 provided the indicated AFD is maintained within the limits of Figure 3.2-1.

A total of 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months of operation may be accumulated with the AFD outside of the target band during this testing without penalty deviation.

b.

THERMAL POWER shall not be increased above 90% or 0.9 x APL (whichever is less) of RATED THERMAL POWER unless the indicated AFD is within the

+ 5X target band and ACTION 2.a) 1), above has been satisfied.

c.

THERMAL POWER shall not be increased above 50/ of RATED THERMAL POWER unless the indicated AFD has not been outside of the

+ 5X target band for more than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months penalty deviation cumulative during the previous 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

SURVEILLANCE RE UIREMENTS 4.2.1.1 The indicated AXIAL FLUX DIFFERENCE shall be determined to be within its limits during POWER OPERATION above 15K, of RATED THERMAL POWER by:

a.

Monitoring the indicated AFD for each OPERABLE excore channel:

l.

At least once per 7 days when the AFD Monitor Alarm is OPERABLE, and 2.

At least once per hour for the first 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months after restoring the AFD Monitor Alarm to OPERABLE status' b.

Monitoring and logging the indicated AXIAL FLUX DIFFERENCE for each OPERABLE excore channel at least once per hour for the first 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months and at least once per 30 minutes thereafter, when the AXIAL FLUX DIFFERENCE Monitor Alarm is inoperable.

The logged values of the indicated AXIAL FLUX DIFFERENCE shall be assumed to exist during the interval preceding each logging.

D.

C.

COOK - UNIT 1

3/4 2-2

,Amendment No. 38, Unit 1

v

~

POWER DISTRIBUTION LIMITS SURVEILLANCE.RE UIREMENTS Continued 4.2.1.2 The indicated AFD shall be considered outside of its + 5X target band when at least 2 of 4 or 2 of 3 OPERABLE excore channels are indicating the AFD.,to be outside the target band.

Penalty deviation "outside of the + 5X target band shall be accumulated on a time basis of:

a.

A penalty deviation of one minute for each one minute of POWER

~

OPERATION outside of the target band at THERMAL POWER levels equal to or above 50/ of RATED THERMAL POWER, and b.

A penalty deviation of one half minute for each one minute of POWER OPERATION outside of the target band at THERMAL POWER levels below 50% of RATED THERMAL POWER.

4.2.1.3 The target axial flux difference of each OPERABLE excore c)annel shall be determined in conjunction with the measurement of F (z) as defined in Specification 4.2.2.2.C.

The provisions of Speci-f cation 4.0.4 are not applicable.

D.

C.

COOK - UNIT 1

3/4 2-3 Amendment No. 38, Unit 1

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Figure 3.2-1 ALLOWABLE DEVIATION FROM TARGET FLUX DIFFERENCE D.

C.

COOK - UNIT 1

Amendment,NO.

38, Unit 1

3/4 2-4 0'.:4'::::-".20 i"-!O :':.I:':::a i::!:.:;1iO:.::.t:::20:.::::I::30'.::::: ':3O.".-:.i::: I/O..:.":.::-:

~

L POWER DISTRIBUTION LIMITS HEAT FLUX HOT CHANNEL FACTOR-F Z

LIMITING CONDITION FOR OPERATION 3.2.2 F (Z,a) shall be limited by the following relationships:

I:F (E,)j F0(Z,s)

< ~>

[K(Z)] for P

> 0.5 F~(Z,a)

< 2 IF~(E )j [K(Z)j for P

< 0.5 p

THERMAL POWER RATED THERMAL POWER F~{E<) is the exposure dependent Fq limit for rod a and L

i s def ined on Figure 3. 2-3a for Exxon Nuc 1 ear fuel, Figure 3.2-3b for Westinghouse fuel and page 3/4 2-15.

E, is the maximum pellet exposure in rod R.

K(Z) is tie function obtained from Figure 3.2-2 for a given core height location.

F~ is defined as the F~{Z,R) with the smallest margin or the greatest excess of the limit.

APPLICABILITY:

MODE 1

ACTION:

With F~ exceeding its limit:

a.

Comply with either of the following ACTIONS:

1.

Reduce THERMAL POWER at 'least 14 for each 1%

F exceeds the limit within 15 minutes and similarly reduce the Power Range Neutron Flux-High Trip Setpoints within the'next 4

hours; POWER OPERATION may proceed for up to a total of 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ; subsequent POWER OPERATION may proceed provided the Overpower (hT Trip Setpoints have been reduced at least 1/ for each 1Ã F exceeds the limit.

The Overpower aT Trip Setpoint reLction shall be perf'ormed with the reactor subcri tical 2.

Reduce THERMAL POWER as necessary to meet the limits of Specification 3.2e6 using the APDMS with the latest incore map and updated R.

b.

Identify and correct the cause of the out of limit condition prior to increasing THERMAL POWER; THERMAL POllER may then be increased provided F~ is demonstrated through incore'apping to be within its limit.

D.

C.

COOK - UNIT 1

3/4 2-5 Amendment No.

38, Unit 1

~

POWER DISTRIBUTION LIMITS SURVEILLANCE RE UIREMENTS 4.2.2el 4.2.2.2 a

~

C.

for P

<.5 The provisions of Specification 4.0.4 are not applicable.

F (Z,)I,) shall be determined to be within its limit by:

Using the movable incore detectors to obtain a power distribution map at any THERMAL POWER greater than 5C of RATED THERMAL POWER.

Increasing the measured F~(Z,a) component of the power distribu-tion map by 3X to account for manufacturing tolerances and further increasing the value by 5X to account for measurement uncertainties.

Satisfying the following relationship at the time of the target flux determination.

F (Z)

Fq(2)

~Pq 2

(K(2)3/(Y(2)1 for P>.5 2F (Z)

Fq(2)

~qZ (K(2))/I:Y(2))

where:

F~(Z)

= F~(Z,a) at a for which is a maximum T

E F~(Z)

= F~(E<)

at R For which L

L is a maximum T

E F (Z) arid F (Z) are functions of core height, Z, and correspond a3 each 2 t3 the rod s for which F (2,s) is a maximum at that Z.

Y(2) is the function defined in Figure 3.2-3, K(Z) is defined in Figure 3.2-2, T(E) is defined in Figures 3.2-3a and 3.2-3b, P is the fraction of RATED THERMAL POWER.

Ep(Z) isLan uncer-tainty factor to account for the reduction in the F(Ea) curve due to an accumulation of exposure prior to tHe next flux map.

Ep(Z)

= 1.00 for T(E)

= 1.0 or T(E)

=.846 Ep(Z)

=

1 + L.014 x F (Z)j for 1;0

> T(E)

>.846 (Z,a), in conjunction with'a target flux difference determinati(n, according to the fo'Ilowing sch'edule:

D. C.

COOK - UNIT 1 3/4 2-6 Amendment No.

38

POWER DISTRIBUTION LIMITS SURVEILLANCE RE UIREMENTS e.

I 1.

Upon achieving equilibrium conditions after exceeding by 10K or more of RATED THERMAL POWER, the THERMAL POWER at which F~(Z) was last determined*, or 2.

At least once per 31 effective full power days, which-ever occurs first.

During power escalation at the beginning of each cycle, the design target may be used until a power level for e

extended operation has been achieved.

With successive measurements indicating an increase in peak pin power, F~4H, with exposure, either of the following additional actions shall be taken.

. l.

F (I2) shall be increased by 2% over that specified in M

4.3.2.2.c, or 2.

F (Z) shall be measured and a target axial flux d Ifference reestablished at least once per 7 effective full power days until 2 successive maps indicate that the peak pin power, F>H, is not increasing.

With the relationship specified in 4.2.2.2.c not being satisfied either of the following actions shall be taken:

l.

Place the core in an equilibrium condition where the limit in 4.2.2.2c is satisfied and remeasure the target axial flux difference.

2.

Comply with the requirements of Specification 3.2.2 for F (Z,R} exceeding its limit by the percent calcu rated with the following expression.

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~p

[K(2)3 x 100 P

>.5 g.

The limits applicable 1.

Lower 2.

Upper specified in 4.2.2.2C and 4.2.2.2f above are not in the following core plane regions:

core region 0 to 10% inclusive.

core region 90K to 100/ inclusive.

4.2.2.3 When F (Z,a) is measured for reasons other than meeting the renoir)ments of Specification 4.2.2.2, an overall measured F (Z, a) shall be obtained from a power distribution map and irIcreased by 3X to account for manufacturing tolerances and further increased by 5X to account for'measurement uncertainty.

D.

C;"

COOK - UNIT 1

3/4 2-7 Amendment No.

38, Unit 1

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Axial Height (feet)

Figure 3.2-3 V(Z) As A Function Of Core Height D.

C; COOK - UNIT 1

I 3/4 2-8(a)

Amendment No. 38, Unit 1

~

POWER DISTRIBUTION LIMITS AXIAL POWER DISTRIBUTION LIMITING CONDITION FOR OPERATION 3.2.6 The axial power distribution shall be limited by the following relationship:

[F (Z)]

=

1.95 K Z (R.)(PL)(l.03)(1

+ 0.)(1.07)

F Where:

a.

F.(Z) is the normalized axial power distribution from thimble j at core elevation Z.

b.

PL is the fraction of RATED THERMAL POWER.

c.

K(Z) is the function obtained from Figure 3.2-2 for a given core height location.

d.

R., for thimble j, is determined from at least n=6 in-"core f)ux maps covering the full configuration of permissible rod patterns at 100Ã or APL (whichever is less) of RATED THERMAL POWER in accordance with:

n R..

j n

~

1 ij Where:

F

. / T(E)

R..-

1J Flj Z Max e.

R.. and its associated

a. may,be calculated on a full core or 5 1/riliting fuel batch basil as defined on page B3/4 3-3 of basis.

F is the limiting total peaking factor in flux map i.

The Qia limiting total peaking factor is that factor with least margin to the FQ(E) curve defined in Figure 3.2-3a for Exxon Nuclear Company fuel and in Figure 3.2-3b for West'inghouse fuel.

D.

C.

COOK - UNIT 1

3/4 2-15 Amendment No.

38, Unit 1

~

g

~

POWER DISTRIBUTION LIMITS LIMITING CONDITION FOR OPERATION Continued T(E) is the ratio of the exposure dependent FQ(E) to '1.95 L

and is defined in Figure 3.2-3a for fuel supplied by Exxon Nuclear Company and in Figure 3.2-3b for fuel supplied by Westinghouse Electric Corporation.

f.

[F..(Z)]M is the maximum value of the normalized axial distri-ij Max bution at elevation Z from thimble j in map i which had a limit-ing total measured peaking factor without uncertainties or densification allowance of FMeas Qia a. is the standard deviation associated with thimble j, expressed ak a fraction or percentage of R

, and is derived from n flux maps from the relationship below~ or 0.02, (2/) whichever is greater.

g.

The factor 1.07 is comprised of 1.02 and 1.05 to account for the axial power distribution instrumentation accuracy and the measurement uncertainty associated with F using the movable detector system respectively.

The factor 1.03 is the engineering uncertainty factor.

F is an uncertain(y factor for Exxon fuel to account for the r3duction in the F (E) curve due to an accumulation of ex-posure prior to th3 next flux map.

This correction is only required when T(E) for the limiting fuel segment is less than-1.0.

The following Fp factor shall apply:

F

= 1.0 F

= 1.0+ 0.005 x

W P

for T(E)

= 1.0 for T(E) ( 1.0 where W is the number of effective full power weeks (rounded up to the next highest integer) since the last full core flux map.,

D.

C.

GOOK - UNIT 1

3/4 2-16 Amendment No.

38, Uni't 1

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POWER DISTRIBUTION LIMITS SURVEILLANCE RE UIREMENTS 4.2.6.1 F.(Z) shall be determined ta be within its limit by:

J a..

Either using the APDMS to monitor the thimbles required per Specification 3.3.3.6 at the following frequencies.

1; At least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , and 2.

Immediately and at intervals of 10, 30, 60, 90,

120, 240 and 480 minutes following:

a)

Increasing the THERMAL POWER above APL of RATED THERMAL POWER, or b)

Movement of control bank "D" more than an accumulated total of 5 steps in any one direction.

b.

Or using the movable incore detectors at the following fre-quencies when the APDMS is inoperable:

l.

At least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , and 2.

At intervals of 30, 60; '90,

120, 240 and 480 minutes following:

a)

Increasing the THERMAL POWER above APL of RATED THERMAL POWER, or b)'ovement of control bank "D" more than an accumulated total of 5 steps in any one direction.

4.2.6.2 When the movable incor'e detectors are used to monitor F.(Z), at least 2 thimbles sha11 be monitored and an F.(Z) accuracy equivalent to that obtained from the APDMS shall be maintained.

D.

C.

COOK - UNIT 1

3/4 2-18 Amendment No.38, Unit 1

4

'I

POWER DISTRIBUTION LIMITS BASES Although it is intended that the plant will be operated with the AXIAL FLUX DIFFERENCE within the +

5% target band about the target flux difference, during rapid plant THERMAL POWER reductions, control rod motion will ca'use the AFD to deviate outside of the target band at re-duced THERMAL POWER levels.

This deviation will not affect the xenon redistribution sufficiently to change the envelope of peaking factors which may be reached on a subsequent return to RATED THERMAL POWER (with the AFD within the target band) provided the time duration of the devi-ation is limited.

Accordingly, a

1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months penalty deviation 'limit cumu-lative during the previous 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is provided for operation outside of the target band but within the limits of Figure 3.2-1 while at THERMAL POWER levels above 50/ of RATED THERMAL POWER.

For THERMAL POWER levels below 50% of RATED THERMAL POWER, deviations the AFD outside of the tar get band are less significant.

The penalty of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months actual time reflects this reduced significance.

Provisions for monitoring the AFD on an automatic basis are derived from the plant process computer through the AFD Monitor Alarm. The

, computer determines the one minute average of each of the OPERABLE excore detector outputs and provides an alarm message if the AFD for at least 2 of 4 or 2 of 3 OPERABLE excore channels are outside the target band and the THERMAL POWER is greater than 90% or'.9 x APL of RATED THERMAL POWER {whichever is less).

During operation at THERMAL POWER levels, between 15% and 90% or 0.9 x APL-of RATED THERMAL POWER (which-everis less),

the computer outputs an alarm message when the penalty deviation accumulates beyond the limits of 1'hour and 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , respectively.'he upper bound limit {90% or 0.9 x APL of RATED THERMAL POWER. (which-ever is less))

on AXIAL FLUX DIFFERENCE assures that the F (Z,a), envelope of 1.95 times K(Z) x T(E) is not exceeded during ~either normal: operation or in the 'event of xenon redistribution following power changes:

The lower bound limit (50% of RATED THERMAL POllER) is based on the fact that at THERMAL POWER levels below 50% of RATED THERMAL POWER, the average linear heat generation rate is half of its nomin)l operating value and below that value, perturbations in localized 'fluk,distributions cannot affect the results of ECCS or DNBR analyses in a manner which would

,adversely affect the health and safety of the public.

-Figure B 3/42-1 shows a typical monthly, target band near the beginning of core life, The bases and methodology for 'establish'ing these. limits is presented in topica'l report-XN-NF-77-57. "Exxon'uclear Power Distribution Control for PWR's-Phase II" and Supplement 1 to that report.

D.

C.

COOK-UNIT 1

-B 3/4 2 Amendment No..38, Unit 1

POWER DISTR IBUTION,LIM ITS BASES 3 4.2.5 DNB PARAMETERS The limits on the DNB related parameters assure that each of the parameters are maintained within the normal steady state envelope of operation assumed in the transient and accident analyses.

The limits are consistent with the initial FSAR assumptions and have been analytically demonstrated adequate to maintain a minimum DNBR of 1.30 throughout each analyzed transient.

The 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months periodic surveillance of these parameters thru in-strument readout is sufficient to ensure that the parameters are restored within their limits following load changes and other expected transient operation.

The 18 month periodic measurement of the RCS total flow rate is adequate to detect flow degradation and ensure correlation of the flow indication channels with measured flow such that the indicated percent flow will provide sufficient verification of flow rate on a 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months basis.

3 4.2.6 AXIAL POWER DISTRIBUTION The limit on axial power distribution ensures that F will be contro1led and monitored on h more exact basis through usII of the APBNS when 'operating above APL of RATED THERMAL POWER.

This additional limitation"on F

is necessary in order to provide assurance that peak clad temperatures will remain below the ECCS acceptance criteria limit of 2200'F in the event of a LOCA.

The unit may operate with fuel assemblies supplied by the Exxon Nuclear Company and by Westinghouse Electric Corporation.

An F

limit has been sp'ecified for each of these two fuel types.

D.

C.

COOK-UNIT 1

B 3/4 2-6 Amendment No.

38, Unit 1

ML17319A560

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