ML20083H874
| ML20083H874 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 12/30/1983 |
| From: | VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| Shared Package | |
| ML20083H873 | List: |
| References | |
| NUDOCS 8401090501 | |
| Download: ML20083H874 (6) | |
Text
_ _ _ _ _ _ _ _ - _ _ _ _
84010904k)1 831230 TABLE 3.3-1 (C:ntinu d)
PDR ADOCK 05000338 P
PDR REACTOR TRIP SYSTEM INTERLOCKS ALLOWABLE DESIGNATION CONDITION SETPOINT VALUES FUNCTION f
-0 P-6 1 of 2 Intermediate range 1 X 10~
<3 X 10 Allows manual block of h
above setpoint (increasing source range reactor trip y
power level)
-II 2 of 2 Interwediate range 5 X 10
>3 X 10 Defeats the block of source
~
below setpoint (decreasing range reactor trip
~~
i power level)
I i
P-10 2 or 4 Power range above set-10%
<11%
Allows manual block of
]
point (increasing power level) power range (low setpoint) and intermediate range reactor trips and intermediate range rod stop. Blocks source range reactor trip.
3 of 4 Power range below set-8%
>7%
Defeats the block of power 1
Sg point (decreasing power level) range (Iow setpoint) and intermediate range reactor y
trips and intermediate op j
range rod stop.
1 j
Input to P-7
- l 4
P-7 2 of 4 Power range above set-10%
<11%
Allows reactor trip on:
j Low flow or reactor coolant point pump breakers open in more or l
1 of 2 Turbine Impulse 10% full load
<11%
than one loop, Undervoltage j
chamber pressure above turbine impulse (RCP busses). Underfrequen-1 setpoint chamber pressure cy (RCP busses). Turbine Trip, Pressurizer low pres-sure, and Pressurizer high level.
(Power level increasing) 1
'I 9-f a e
ATTAC&fENT 2 I
l l
i l
i
'A l
l
- 9
- r-q s TABLE 3.3-1 (Continurd)
REACTOR TRIP SYSTEM INTERLOCKS ALLOWABLE g
DESIGNATION CONDITION
- SETPOINT VALUES FUNCTION
' '//
7
-10
-10 P-6 1 of 2 Intermediate range 1 X 10
<3 X 10 Allows manual block of g
above setpoint (increasing source range reactor trip i
power level)
-II
~II Defeats the block of source 2 of 2 Intermediate range 5 X 10
>3 X 10 y
below setpoint (decreasing range reactor trip power level) g
}
P-10 2 or 4 Power range.above set-10%
<11%
Allows manual block of point (increasing power level) power range (low setpoint) and intermediate range reactor trips and intermediate range rod stop. Blocks source range reactor trip.
y 3 of 4 Power range below set-8%
>7%
Defeats the block of power (a
point (decreasing power level) range (low setpoint) and intermediate range reactor 4
trips and intermediate range rod stop.
Input to P-7 P-7 2 of 4 Power range above set-10%
<11%
Allows reactor trip on:
Low flow or reactor coolant point pump breakers open in more or 1 of 2 Turbine Impulse 10% full load
<11%
than one loop. Undervoltage chamber pressure above turbine impulse (RCP busses), Underfrequen-setpoint chamber pressure cy (RCP busses), Turbine Trip, Pressurizer low pres-sure, and Pressurizer high level.
(Power level increasing)
1 9
O J
ATTACHMENT 3
~
e DISCUSSION OF PROPOSED TECHNICAL SPECIFICATION CHANGES Having the input to P-7 from turbine impulse pressure based on Rated Thermal Power rather than Turbine Load is an apparent administrative error.
Westinghouse setpoint for P-13 is impulse pressure at 10% of Turbine Load.
The F-13 interlock is the input from the impulse pressure channels to P-7.
The proposed change will allow the system to be operated as designed.
This change is consistent with the Setpoint Study /PLS for North Anna.
Therefore, the probability of occurence or the consequences of a malfunction of equipment important to safety and previously evaluated in the FSAR is not increased, the possibility of a different type of accident or malfunction than was previously evaluated in the FSAR has not been created and the margin of safety as described in the BASIS section of any part of the Technical Specification is not reduced.
i
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VIROCIA ELECTRIC AND POWER C'OMPANY 1357898 12/30/83 3303_
CHECK V UCHER BANK NO.
CHECK NO.
o,1, y,Noo, no UNE DATE INVOICE NO/OR DESCRl* TION GROSS AMOUNT DISCOUNT NET AROUNT 1 12/22/83 NA 1 & 2 TECK SPEC CHAN 1,600.00 0.0C 1,600.00 ATTAcr4ED CHECK ISSUEO AS PAYMENT OF ITEMS USTED ABOVE - PLEASE DETACH STUB ANO CASH CHECK PROMPTLY.68-589 VIRGINIA ELECTRIC AND power COMPANY ICHMOND. VIRGINIA BANK OF VIRGINIA WHrTE SYONE. VA.
VOID IF NOT CASHED IN 90 DAYS 03301 25 1357848 00000160000 ONE THOUSAND SIX HUNDRED AND 00/100 DOLLARS PAY
'"* * ~
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f, UNITED STATES NUCLEAR caon REGULATORY COPf4ISSION 25 1357848 12/30/83 3301
$ 1,600.00 NUCLEAR REG C DC 20555
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