Text

Proposed Tech Specs Replacing Current one-eigth Core Inca Incore Analysis Program W/New Full Core Pidal Analysis Program
	ML18054B059
Person / Time
Site:	Palisades
Issue date:	10/23/1989
From:	; CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	;
Shared Package
ML18054B058	List: ML18054B057; ML18054B059; ML18054B060; ML18054B061;
References
	NUDOCS 8911010082
	Download: ML18054B059 (16)
	v • d • e

r 3.11 POWER DISTRIBUTION INSTRUMENTATION 3.11.l INCORE DETECTORS LIMITING CONDITION FOR OPERATION The incore detection system shall be operable:

a.

With at least 160 of the 215 possible incore detectors and 2 incores per axial level per core quadrant.

/

b.

With the incore alarming function of the datalogger operable and alarm set points entered into the datalogger.

APPLICABILITY (1) Item a. above is applicable when the incore detection system is used for:

Measuring quadrant power tilt, Measuring radial peaking factors, Measuring linear heat rate (LHR), or Determining target Axial Offset (AO) and excore monitoring allowable power level.

(2) Items a. and b. above are applicable when the incore detection system is used for monitoring LHR with automatic alarms.

(Incore Alarm System).

ACTION 1:

With less than the required number of incore detectors, do not use the system for the measuring and calibration functions under (1) above.

ACTION 2:

With the alarming function of the datalogger inoperable, do not use the system for automatic monitoring of LHR (Inoperable Incore Alarm System).

,.- 0911010002. aii&o'155 PDR ADOCK 0 PNU p

3-65 Amendment No $0,

~S.

TSP0889-0181-NL04 I

POWER DISTRIBUTION LIMITS 3.23.1 LINEAR HEAT RATE (LHR)

LIMI~ING CONDITION. FOR OPERATION ACTION 3:

If the incore alarm system is inoperable and the excore monitoring system is not being used to monitor LHR, operation at less than or equal to 85% of rated power may continue provided that incore readings are recorded manually.

Readings shall be taken on a minimum of 10 individual detectors per quadrant (to include a total number of 160 detectors in a 10-hour period) within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months and at least every 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months thereafter.

If readings indicate a local power level equal to or greater than the alarm setpoints, the action specified in ACTION 1 above shall be taken.*

Basis The limitation of LHR ensures that, in the event of a LOCA, (l) the peak temperature *of the cladding will not exceed 2200°F.

Either of the two core power distribution monitoring systems (the incore alarm system or the excore monitoring system) provides adequate monitoring of the core power distribution and is capable of verifying that the LHR does not exceed its limits.

The incore alarm system performs this function by continuously monitoring the local power at many points throughout the core and comparing the measurements to predetermined setpoints above which the limit on LHR could be exceeded.

The excore monitoring system performs this function by providing comparison of the measured core AO with predetermined AO limits based on incore measurements.

An Excore Monitoring Allowable Power Level (APL), which may be less than rated power, is.applied when using the excore monitoring system to ensure that the AO limits adequately restrict the LHR to less than the limiting values. C4)

If the incore alarm system and the excore monitoring system are both inoperable, power will be reduced to provide margin between the actual peak LHR and the LHR limits and the incore readings will be manually collected at the terminal blocks in the control room utilizing.a suitable signal detector.

If this is not feasible with the manpower available, the reactor power will be reduced to a point below which it is improbable that the LHR limits could be exceeded.

3-104 Amendment No.

~S, Sl, ttS, TSP0889*0181-NL04 I

POWER DISTRIBUTION LIMITS 3.23.l LINEAR HEAT RATE (LHR)

LIMITING CONDITION FOR OPERATION Basis (Contd)

The time interval of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and the minimum of 10 detectors per quadrant are sufficient to maintain adequate surveillance of the core power distribution to detect significant changes until the monitoring systems are returned to service.

To ensure that the design margin of safety is maintained, the determination of both the incore alarm setpoints and the APL takes into account the local LHGR measurement uncertainty factors I

given in Table 3.23-3, an engineering uncertainty factor of 1.03, I

and a thermal power measurement uncertainty factor of 1.02.

I References (1)

ANF-88-107 (2)

(Deleted)

(3)

(Deleted)

(4)

XN-NF-80-47 (5)

FSAR Section 3.3.2.5 I

3-105 Amendment No.

~S. ttS, (next page is 3-107)

TSP0889-0181-NL04

Peak Rod TABLE 3.23-1 LINEAR HEAT RATE LIMITS No. of Fuel 208 15.28 kW/ft TABLE 3.23-2 Rods in Assembly 216 15.28 kW/ft RADIAL PEAKING FACTOR LIMITS,FL Peaking Factor No. of Fuel Rods in Assembly 208 216 Assembly FA r 1.48 1.50 Interior Rod FtiH r

1. 70

1. 73 TABLE 3.23-3 POWER DISTRIBUTION MEASUREMENT UNCERTAINTY FACTORS LHR/Peaking Factor Measuremenr )

Uncertainty a Measuremenfb)

Parameter Uncertainty LHR 0.0623 0.0664 FA r 0.0401

a.0490 Ftih r

0.0455 0.0526 (a) Measurement uncertainty for reload cores using all fresh incore detectors.

(b) Measurement uncertainty for reload cores using a mixture of fresh and once-burned incore detectors.

3-107 Amendment No.

~S, ttS, TSP0889-0181-NL04 I

I I

I

POWER DISTRIBUTION LIMITS 3.23.2 RADIAL PEAK.ING FACTORS LIMITING CONDITION FOR OPERATION

~

The radial peaking factors y--, and F shall be less than or equal to r

r the value in Table 3.23-2 times the following quantity.

The quantity is [1.0 + 0.3 (1 - P)] for P >.5 and the quantity is 1.15 for P <.5.

P is the core thermal power in fraction of rated power.

APPLICABILITY:

Power operation above 25% of rated power.

ACTION:

1.

For P < 50% of rated with any radial peaking factor exceeding its limit, be in at least hot shutdown within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

2.

For P > 50% of rated with any radial peaking factor exceeding its limit, reduce-thermal power within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months to less than the lowest value of:

F

[1 - 3.33 l..!. - 1) ] x Rated Power FL Where F is the measured value of either ~ or F8H and FL is the r

r' r

corresponding limit from Table 3.23-2.

Basis A

8H The limitations on F, and F are provided to ensure that assemptions used r

r in the analysis for establishing DNB margin, LHR and the thermal margin/low-pressure and variable high-power trip set points remain valid during operation. Data from the incore detectors are used for determining the measured radial peaking factors.

The periodic surveillance requirements for determining the measured radial peaking factors provide assurance that they remain within prescribed limits. Determining the measured radial peaking factors after each fuel loading prior to exceeding 50% of rated power provides additional assurance that the core is properly loaded.

To ensure that the design margin of safety is maintained, the determination I

of radial peaking f~t~ors takes into account the appropriate measurement I

uncertainty factors given in Table 3.23-3.

I References I

(1)

FSAR Section 3.3.2.5 I

3-111 Amendment No. IS, ttS, TSP0889-0181-NL04

POWER DISTRIBUTION LIMITS 3.23.3 QUADRANT POWER TILT - T LIMITING CONDITION FOR OPERATION The quadrant power tilt (T ) shall not exceed 5%.

q APPLICABILITY:

Power operation above 25% of rated power.

ACTION:

1.

With quadrant power tilt determined to exceed 5% but less than or equal to 10%.

a.

Correct the quadrant power tilt within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after exceeding the limit, or

b.

Determine within the next 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and, at least once every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, that the radial peaking factors are within the limits of Section 3.23.2, or

c.

Reduce power, at the normal shutdown rate, to less than 85% of rated power and determine that the radial peaking factors are within the limits of Section 3.23.2.

At reduced power, determine at least once every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months that the radial peaking factors are within the limits of Section 3.23.2.

2.

With quadrant power tilt determined to exceed 10%:

a.

Correct the quadrant power tilt within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after exceeding the limit, or

b.

Reduce power to less than 50% of rated power within the next 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and determine that the radial peaking factors are within the limits of Section 3.23.2.

At reduced power, determine at least once every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months that the radial peaking factors are within the limits of Section 3.23.2.

3.

With the quadrant power tilt determined to exceed 15%, be in at least hot standby within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

Basis Limitations on quadrant power tilt are provided to ensure that design safety margins are maintained.

Quadrant power tilt is determined from excore (l) detector readings which are calibrated using incore detector measurements.

Quadrant power tilt calibration factors are detennine~ 2~sing incore I

measurements and an incore analysis computer program.

I 3-112 Amendment No.

~S, ttS, TSP0889-0181-NL04,

POWER DISTRIBUTION LIMITS 3.23.3 QUADRANT POWER TILT - T LIMITING CONDITION FOR OPERATION References (1)

FSAR, Section 7.4.2.2 (2)

FSAR Section 7.6.2.4 TSP0889-0181-NL04 I

3-113 Amendment No.

~S,

TSP0889-0181-NL04 ATTACHMENT 2 Consumers Power Company Palisades Plant Docket 50-255 MARKED-UP TECHNICAL SPECIFICATION PAGES October 23, 1989 7 Pages

3. 11 POWER DISTRIBCTION INSTRUMENTATION 3.11.l INCORE DETECTORS LIMITING CONDITION FOR OPERATION The incore detection system shall be operable:

l"'f)

J JS possible.

With at least ~

of the;{incore detectors

a.

per axial level per core quadrant.

and 2 incores

b.

With the incore alarming function of the datalogger operable and alarm set points entered into the datalogger.

APPLICABILITY (1)

Item a. above is applicable when the incore detection system is used for:

Measuring quadrant power tilt, Measuring radial peaking factors, Measuring linear h.eat rate (I.HR), or Determining target Axial Offset (AO) and excore*

monitor:irig allowable power level.

(2)

Items a. and b. above are applicable when the incore detection system is used for monitoring I.HR with automatic alarnis.

(Incore Alarm System.)*

ACTION 1:

With less than the required number of incore detectors, do not use the system for the measuring and calibration functions under (1) above.

ACTION 2:

With the alarming function of the datalogger inoperable, do not use the system for automatic monitoring of I.HR (Inoperable Incore Alarm System)

nul28l-0445a-43-71 3-65 Amendment No ilf. j~

.Eecembar !, 1'8~

(

POWER DISTRIBUTION LIMITS 3.23.1 LINEAR HEAT RATE (LHR)

LIMITING CONDITION FOR OPERATION ACTION 3:

If the incore alarm system i the excore monitoring system is not bei r LHR, operation at less than or equal to 85%

f rated _power ay continue provided that incore readings are recorded ma ually.

Readings shall be taken on a minimum of 10 individual tectors per quadrant (to include !£1! :! **e total number of detectors in a 10-hour period) within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months and at least every 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months thereafter. If readings indicate a local power level equal to or greater than the alarm setpoints, the action specified in ACTION 1 above shall be taken.

Basis The limitation of LHR ensures that, in the event of a LOCA, the peak temperature of the cladding will not exceed 2200°F. (l)

Either of the two core power distribution monitoring systems (the incore alarm system or the excore monitoring system) provides adequate monitoring of the core power distribution and is capable of ver1 r ying that the L~. does not excer.'.'.' its limits.

The incore alarm system performs this function by continuously monitoring the local power at many points throughout the core and comparing the measurements to predetermined setpoints above which the limit on LHR could be exceeded.

The excore monitoring system performs this function by providing comparison of the measured core AO with predetermined AO limits based on incore measurements.

An Excore Monitoring Allowable Power Level (APL), which may be less than rated power, is applied when using the excore monitoring system to ensure that th* AO limits adequately restrict the LHR to less than the limiting values. (4)

If the incore alarm system and the excore monitoring system are both inoperable, power will be reduced to provide margin between the actual peak LHR and the LHR limits and the incore readings will be manually collected at the terminal blocks in the control room utilizing a suitable signal detector. If this is not feasible with the manpower available, the reactor power will be reduced to a point be~ow which it is improbable that the LHR limits could be exceeded.

3-104 TSP1088-0181-NL04 Amendment No. * 82,"j.~

ffo9eudie'r l'* lPi&

I

POWER DISTRIBUTION LIMITS 3.23.1 LINEAR HEAT RATE (LHR)

LIMITING CONDITION FOR OPERATION Basis (Contd)

The time interval* of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and the min-imum of 10 detectors per quadrant are sufficient to maintain adequate surveillance of the core power distribution to detect significant changes until the monitoring systems are returned to service.

To ensure that the design margin of safety is maintained, the determination of both the incore alarm setpoints and the APL takes into account"1tmeasurement uncertainty factorso:f l.lO, an

/

engineering uncertainty factor of l.03;~a thermal power '--

}

I

=rement uncertainty factor of 1. 02, aa~ all~raaee feli' q/

References

./'

,,-.\\Jf'"I :... 1"'b\\-e. 3.2.3-3 (1)

ANF-88-107 (2)

(Deleted)

(3)

(Deleted)

(4)

XN-NF-80-47 CS'>

(SAR.

Sec.\\~""' 1.1. 2. S:-

3-105 (next page is 3-107)

TSP1088-0181-NL04 Amendment No. -** JJ~)

NnuemoH' U, 1988-I

.~

1

TABLE 3.23-l LINEAR HEAT RATE LIMITS

' q)

. \\.

No. of Fuel Rods in Assembly 208 216 f

':/

.+

)t.

Peak Rod 15.28 kW/ft 15.28 kW/ft

.~

E

'!ft u

J

~

. '4-

. d' *

d I:' V\\

.. (..

II\\ !O d) j -r s:

I.I\\

rJ oJ v

-r

(.. u di

~~

tJ

QI 0

-1'

(.-

d 0

-a Cl u

d -

~

0 QI *-

QI

. -0 TABLE 3.23-2 RADIAL PEAKING FACTOR LIMITS,FL Peaking Factor No. of FU*l Rod* in Assembly I... QI

c..

0

{:

0

~

208 216 f

~

.E

-r

~

d

'a I

<,.. \\I\\ c-t:

QJ(..

QJ 0

! () ~

+ ::J "O u

~

+ llJ] d t: +

Q) t) ~~

~ -?j Ill

~

OI QJ

=18i~t.

<II 0

,,/\\ ~

gg ~~

~~

0

~

0 Assembly r!

l.48 l.50 Int*rior Rod r!B 1.70 1.73 TA8l~ 3.;u-~ *

~

i>lST'?-t&t.TjOU l't'\\EASURemet.>T u~c.etaiAINTY ~ACTO~S t.ti&-~ f>ecitin~

M~te.h\\9t\\ ~

M eo.~re..~+-

t (AC.'°"

C'(l.~ e. ~&.("

l.l"CeA.io.i I\\ ty.

' ll"" B1 ~i

.... ~y I CL 'I

( \\o)

L."" R.

O. OC#.l. ~

o,oC.t.'f

~A r

o.o4ol

o. D "I 't 0

~A.H

o. o'ISS-

o. oS:\\lc>

t 3-107 TSP0888-0105-NL04

POWER DISTRIBUTION LIMITS 3.23.2 RADIAL PEAKING FACTORS LIMITING CONDITION FOR OPERATION The radial peaking factors ~. and F~H shall be less than or equal to r

. r the value in Table 3.23-2 times the following quantity.

The quantity is [1.0 + 0.3 (1 - P)] for P ~.5 and the quantity is 1.15 for p <.5.

p is the core thermal power in fraction of rated power.

APPLICABILITY:

Power operation above 25% of rated power.

ACTION:

1.

For P < 50% of rated with any radial peaking factor exceeding its limit, be in at least hot shutdown within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

2.

For P > 50% of rated with any radial peaking factor exceeding its limit, reduce thermal power within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months to less than the lowest value of:

F

[l - 3.33 (.r -

1) ] x Rated Power FL Where F is the measured value of either rA, r

r is the corresponding limit from Table 3.23-2.

Basis The limitatlJns on ~' and ~~H are provided to ensure that assumptions used in the analysis for establishing DNB margin, LHR and the thermal margin/low-pressure and variable high-power trip set points remain valid during operation.

Data from the incore detectors are used for determining the.measured radial peaking factors.

The periodic surveillance requirements for determining the measured radial peaking factors provide assurance that they remAin within prescribed limits *. Determining the measured radial peaking factors after each fuel loading prior to exceeding 50% of rated power provides additional assurance that the core is properly loaded.

lo e.V\\Su.te..f\\\\aJ 4-he.. de~1*5" w.a.r~ir\\ o~ SQ..CeA't. 1'5 Mo.it\\~~~t\\ed, +~e

/

de..l,e<"'M1*V\\o.h:o"" o-' l'Q.~*'o..\\ peo.t.1*~~..Q..c.J*ors +o.r.Qs, jA-l-o a.a.. ou..~ +

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I To..\\o\\~ ~. l~-3.

/

Re tefe-\\1\\C.e~

/

3-111 TSP1088-0181-NL04 Amendment No. SI, }/I,;

~i::vemeu 15. 1988

/

l -

POWER DISTRIBUTION LIMITS 3.23.3 QUADRANT POWER TILT - T LIMITING CONDITION FOR OPERATION The quadrant power tilt (T ) shall not exceed 5%.

q APPLICABILITY:

Power operation above 257. of rated power.

ACTION:*

1.

With quadrant power tilt determined to exceed 5% but less than or equal to 10%.

a.

Correct the quadrant power tilt w~thin 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after exceeding the limit, or

b.

Determine within the next 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and, at least once every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, that the radial peaking factors are within the limits of Section 3.23.2, or

c.

Reduce power, at the normal shutdown rate, to less than 85%

of rated power and determine that the radial peaking factors are within* the limits of Section 3.23.2. At reduced power, determine at least once every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months that the radial peaking factors are within the limits of Section 3.23.2 *

2.

With quadrant power tilt determined to exceed 10%:

a.

Correct the quadrant power tilt within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months after exceeding the limit, o~

b.

Reduce pow~r to less than 50% of rated power within the next 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and determine that the radial peaking factors are within the limits of Section 3.23.2.

At reduced power, determine at least once every 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months that the radial peaking factors are within the limits of Section 3.23.2.

3.

With the quadrant power tilt determined to exceed 15%, be in at least hot standby within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

Basis Limitations on quadrant TSP1088-0181-NL04

't I

POWER DISTRIBUTION LIMITS 3.23.3 QUADRANT POWER TILT - Tq LIMITING CONDITION FOR OPERATION References (1)

FSAR, Section 7.4.2.2 Ll) PS~ Sec,,.\\-,* 6""I\\ 7. ~. ';l, '-/

nul281-0445a-43-71 3-113

Amendment No JI; CeGemee~ 8, l'~

I

TSP0889-0181-NL04 ATTACHMENT 3 Consumers Power Company Palisades Plant Docket 50-255 FULL CORE PIDAL SYSTEM SOFTwARE DESCRIPTION October 23, 1989 143 Pages

ML18054B059

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