ML20033G522

Proposed Tech Specs Deleting Power Range,Neutron Flux & High Negative Rate Trip

ML20033G522
Person / Time
Site:	Callaway
Issue date:	03/06/1990
From:	UNION ELECTRIC CO.
To:
Shared Package
ML20033G519	List: ML20033G518 ML20033G522
References
NUDOCS 9004100166
Download: ML20033G522 (6)

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ULNRC-2170 Page 1 of 6.

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PROPOSED TECIEJCAL SPECIFICATION CHANGES i

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v Table 2.2-1 2 )

Bases 2.2.1 B2-4 s

Table 3.3-1 3/4 3-2 Table 3.3-2 3/4 3-7 A

Table 4.3-1 3/4 3~ e.l

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TABLE 2.Z-1 REACTOR TRIP SYSTEM INSTRt#ENTATION TRIP SETPOINTS h

TOTAL SENSOR ERROR

{

FUNCTIONAL UNIT ALLOWANCE (TA)

Z_

151 TRIP SETPOINT ALLOWA8LE VALUE 3E 1.

Manual Reactor Trip N.A.

N.A.

N.A.

N.A.

N.A.

2.

Power Range, Neutron Flux E

a.

High Setpoint

7. 5 4.56 0

1109% of RTP*

1112.3% of RTP*

]

h.

Low Setpoint 8.3 4.56 0

125% of RTP*

128.3% of RTP*

3.

Power Range. Neutron Flux.

2.4 0.5 0

14% of RTP* with

<6.3% of RTP* with High Positive Rate a time constant a time constant a

>2 seconds

>2 seconds

('

f P

YF gf px ff j

L2

> s oW 5.

Intermediate Range.

17.0 8.41 0

125% of RTP*

135.3% of RTP*

p Neutron Flux 6.

Source Range, Neutron Flux 17.0 10.01 0 1015 cps 1

5 1 6 x 10 cps 7

Overtemperature AT 9.3 6.47 1.83 See Note 1 See Note 2 1

+1.24***

8.

Overpower AT 5.7

'I.46 1.8 See Note 3 See Note 4 l

9.

Pressurizer Pressure-Low 5.0 2.21 2.0

>1885 psig

>1874 psig

10. Pressurizer Pressure-High 7.5 4.%

1.0 12385 psig 2

1 400 psig s

11. Pressurizer Water Level-8.0 2.18 2.0 g

High

~<921 of instrument

<93.8% of instrument span span

12. Reactor Coolant Flou-Low 2.5 1.38 0.6

>901 of loop

>88.8% of loop l

E minimum measured slalaum measured flow **

flow **

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• RTP = RATED THERMAL POWER w

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• • Minimum Measured Flow = 95.660 gpm hg OhD i

• • • Two Allowances (temperature and pressure, respectively)

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l Rn.y I (MlllNG '.All lY \\Y%llM SI TTINGS BAbts RfACTOR TR!D SYSTEM INSTRUMENTATION SETP0INTS (Continued)

The various Reactor trip circuits automatically open the Reactor trip oreakers wnenever a condition monitored by the Reactor Trip System reacnes a preset or calculated level.

In addition to redundant channels ano trains the uesign accroach trovices a Reactor Trip System which monitors numerous system variaDies, therefore providing Trin System functional diversity.

Tne func-tional capaDility at the specified trip setting is required for those antici-patory or diverse Reactor trips for which no direct credit was assumed in the safety analysis to enhance the overall reliability of the Reactor Trip i

sy e. t em.

Tne Reactor Trip System initiates a Turbine trip signal whenever i

Weactor trip is initiated.

This prevents the reactivity insertion tnat woule otherwise result from excessive Reactor Coolant System enolcown and thus avoics unnecessary actuation of the Engineered Safety Features Actuation System.

Manual Reactor Trip the Reactor Trip System includes manual Reactor trip capability.

M er Rance, Neutron Flux in each of the Power Range Neutron Flux channels there are two independent i

Distables, each with its own trip setting used for a High and Low Range trip setting.

The Low Setpoint trip provides protection during suberitical and low power operations to mitigate the consequences of a power excursion Deginning from Inw power, and the High Setpoint trip provides protection curing power operations to mitigate the consequences of a reactjvity excursion from all

Tevels, power the Low Setpoint trip may be manually blocked above P-10 (a power level I

of approximately 10% of RATED THERMAL POWER) and is automatically reinstated below the P-10 Setpoint, i

Powe,r Range, Neutron Flux, High Rate /

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Ihe Power Range Positive Rate trip provides protection against rapid flux increrises which are characteristic of a rupture of a control roo drive housing.

Specifically this trip complements the Power Range Neutron Flux Hign aria Low Irios to ensure that the criteria are met for rod ejection from mic-power,

/ Ve c%ey Ra v

s prot tion for onfrol roc t

idents. ge Negati e R te trip pf o a At igh owe a s)figl or it'ble od e o ci 6nt.ou d r is 10 1 ux aki whJ h c@ ld au an neo serv ive oc 0 BR.o ex ', t.

Ih Pow Ra e Ne(a R e ip 11 reve th' fr m cu ir ey 6 11) in he actp.

c it s Jaken or era on o th Po er a N gati e R4 t D fo thp e c troi ro# cro accidents or hi DN Rs ill be y ente / tha the imi( val e.

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TABLE 3.3-1 REACIOR TRIP SYSTEM INSTRtlMENTATION E

MININUM TOTAL NO.

CHANNELS CHANNELS APPLICABLE FUNCil0NAL UNIT OF CHANNELS TO TRIP OPERABLE MODES ACil0N Eq 1.

Manual Reactor Irip 2

1 2

1, 2 1

2 1

2 3*,4*,5*

10 g

2.

Power Range, Neutron Flux 3.

High Setpoint 4

2 3

1, 2 2#

j b.

Low Setpoint 4

2 3

18##, 2 2#

3.

Power Range, Neutron flux 4

2 3

1, 2 2#

liigh Positive Rate M

4.

to

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f f

f ll l

l s

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S.

Intermediate Range, Neutron Flux 2

1 2

18##, 2 3

ev 6.

Source Range, Neutron Flux d.

$tdrtup 2

1 2

2##**

4 l

b.

Shutdown 2

1 2

3**, 4, 5 5

3 1

1 7.

Overtemperature AT four Loop Operation 4

2 3

1, 2 6#

Pi en d

8.

Overpower AI x

U" tour Loop Operation 4

2 3

1, 2 6#

5 9.

Pressurizer Pressure-tow 4

2 3

1 6#

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10.

Pressurizer Pressure-High 4

2 3

1, 2 6#

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TABLE 3.3-2

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REACTOR TRIP SYSTEM INSTRtM NTATION RESPONSE TIMES E,

]

FUNCIIONAL UNII RESPONSE TINE 1.

. Manual Reactor Trip N.A.

~

2.

Power Range, Neutron Fiux 1 0.5 second*

3.

Power Range, Neutron Flux, High Positive Rate N.A.

-[5 5.

Intermediate Range, Neutron Flux N.A.

{

6.

Source Range, Neutron Flux N.A.

"4 7.

Overtemperature af i 6.0 seconds" 8.

Ove: power ai-1 6.0 seconds

• 9.

Pressurizer Pressure-Low 1 2.0 seconds 10.

Pressurizer Pressure-High 1 2.0 seconds 11.

Pressurizer Water Level-High N.A.

• Neutron detectors are exempt from response time testing. Response time of the neutron flux signal portion of the channel shal1 be measured from detector output or input to first electronic component in channel.

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TABLE 4.3-1 9

KACIOR TRIP SYSTEN INSTRINENTATIGII SURVElitAIICE REQIIIREIENIS i

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TRIP AIIALOG ACIMATIIIG NDOES FOR CIIAISEL MVICE lASICN E

CNANNEL CNAleIEL GPERATI0lIAL GPERATICIIAL AciuRTION SUINElttAIICE U

FUNCIl0NAL UNIT CHECK CALIBRATIGII TEST TEST teGIC TEST IS KQllIKS l

1.

Manual Reactor irly N.A.

N.A.

/, M.A.

R(16)

N.A.

1,2,3*,4*,5*l e

2.

Power Range, Neutron Flux a.

High Setpoint 5

S(2,4),

W14)

N.A.

N.A.

1, 2 N(3, 4),

i W 4. 6),

R(4,5) is.

Low Setpoint S

R(4)

S/U(1)

N.A.

N.A.

18##, 2 3..

Power Range, Neutron Flux, M.A.

R(4)

H14)

N.A.

N.A.

I, 2 liigh Positive Rate '

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4.

Po#erAm(geylle,adred d ILI.

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5.

Intermediate Range, S

R(4,5)

S/t1(1)

N.A.

W.A.

18##, 2 l

Neutron Flux i

1 6.

Source Range, Neutron flux 5

R(4,5,12)

S/U(1),MS.14)

N.A.

II. A.

288, 3, 4, 5

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l 7.

Overtemperatene AT 5

R(13) 514)

N.A.

N.A.

1, 2 8.

Overpower AT 5

R M14)

N.A.

N.A.

1, 2

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9.

Pressurizer Pressure-Low 5

R W14)

N.A.

N.A.

1 10.

Pressurizer Pressure-Nigh 5

R W14)

N.A.

N.A.

1, 2 l

E j

11.

Pressurizer Water level-High 5

R W14)

N.A.

N.A.

I 12.

Reactor Coolant Flow-Low 5

E M14)

N.A.

N.A.

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