ML20236L589

Proposed Tech Spec 2.3-1, Limiting Safety Sys Settings, Protective Instrumentation

ML20236L589
Person / Time
Site:	Prairie Island
Issue date:	11/03/1987
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML20236L521	List: ML20236L519 ML20236L528 ML20236L544 ML20236L589
References
NUDOCS 8711100441
Download: ML20236L589 (5)

Text

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) EXHIBIT B Prairie Island Nuclear Generating Plant - ,)

License Amendment Recuest Dated November 3. 1987 >

Exhibit'B consists.of marked up pages of the Prairie Island Technical' Specifications showing the proposed changes listed below:

Pace: .-

TS.2.3-1 I

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l 8711100441 B71103 PDR ADOCK 05000202 p PDR

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/ TS.2 3-1' REV 26 9/6/'9 1

l 23 LIMITING SAFETY SYSTEM SETTINOS, PROTECTIVE INSTRUMENTATION applicability Applies to trip settings fo'r instruments. monitoring reactor power <

.and reactor coolant pressure, temperature, flow, and pressurizer level.

Objective To provide for automatic protective action in the event that  ;

the principal process variables approach a safety limit.

Specification I

A. Protective instrumentation settirgs for reactor trip shall l i be as follows: l l

1. Startup protection I

l a. High flux, intermediate range (high, set point) -

current equivalent to 140% of full power.

b. High flux, power range (low set point) -

IGM of rated power.

Ydb c. High flux, soureg range -

neutron flux 110 counts /second 4

2. Core protection

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a. l

! High flux, power range (high set point) - l 1108% of rated power.

b. High pressurizer pressure - $2385 psig. i i

c. Low pressurizer pressure - >1815 prig. )

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d. Overtemperature AT  ;

y l AT S AT, [K1 ~K2 (T-T') (1+t 14g ,s) + 3K (P-P') - f ( AI)]

2 s

where AT, = Indicated A T at rated power T =

Average temperature, F j T' = 567.3 F ']

P = Pressurizer pressure, psig }

P' = psig 2235 g i 1.11 K

2

= 0 0090 i K

3

= 0.000566 c

1

= 30 sec ,

t2 = 4 see 1 4

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EXHIBIT C i j

Prairie Island Nuclear Generating Plant License Amendment Recuest Dated November 3. 1987

. Exhibit C consists of retyped pages of the Prairie Island Technical Specifications showing the proposed changes' listed below:

Page.: i TS.2.3-1 l

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TS.2.3-1 REV 2.3 LIMITING SAFETY SYSTEM SETTINGS, PROTECTIVE INSTRUMENTATION Applicability Applies to trip settings for instruments monitoring reactor power and reactor coo} ant pressure, temperature, flow, and pressurizer level.

Objective To provide for automatic protective action in the event that the principal process variables approach a safety limit.

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! Specification 1

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A. Protective instrumentation settings for reactor trip shall be as follows:

1. .Startup protection l l

l a. High flux, intermediate range (high set point.) -

l current equivalent to 140% of full power.

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b. High flux, power range (low set point) - '

140% of rated power.

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c. High flux, soureg range -

1 neutron flux <10 counts /second

2. Core protection

a. High flux, power range (high set point)~-

1108% of rated power.

b. High pressurizer pressure - 12385 psig.

l c. Low pressurizer pressure-- >1815 psig.

d. I Overtemperature 6T j ATt i o 1

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2(- (1+ ) +' 3(P- M - f (AI)]

where j AT = Indicated AT at rated power T = Average temperature, 'F i

T' = 567.3*F P =

Pressurizer pressure, psig 1 I

P' = psig 2235 j K < l.11 j K - 0.0090 -j K

3

=

0.000566  !

t =

30 sec '

t 2

= 4 sec

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EXHIBIT D I

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Prairie Island Nuclear Generating Plant -

i License Amendment Reauest Dated November 3.'1987' )

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Exhibit D consists of NSPNAD-8725, " Analysis of the Revised Low Setpoint

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j for High Flux, Power Range", October, 1987. ,

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