ML20206N313

Proposed Tech Specs Re Replacement of Nuclear Instrumentation Sys Source & Intermediate Range Channels & post-accident Neutron Flux Monitoring Sys

ML20206N313
Person / Time
Site:	Vogtle
Issue date:	06/30/1998
From:	SOUTHERN NUCLEAR OPERATING CO.
To:
Shared Package
ML20206N309	List: ML20206N305 ML20206N313
References
NUDOCS 9812160238
Download: ML20206N313 (6)

Text

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! ENCLOSURE 2 I

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i MARKED-UP REVISIONS TO BASES PAGES i

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. B 3.3.1 BASES REFERENCES ~2. FSAR, Chapter 6. '

(continued)

3. FSAR, Chapter 15'. . i

4. IEEE-279-1971. .

5. 10 CFR 50.49.

~

6. WCAP-11269, Westinghouse Setpoint Methodology for Protection Systems; as supplemented by:'

• Amendments 34 (Unit 1) and 14 (Unit' 2), RTS Steam Generator Water Level - Low Low, ESFAS Turbine Trip and Feedwater Isolation SG Water Level - High High, and ESFAS AFW SG Water Level - Low Low.

Amendments 48 and 49 (Unit 1) and Amendments 27 and 28 (Unit 2), deletion of RTS . Power Range I Neutron Flux High Negative Rate Trip.

• Amendments 60 (Unit 1) and 39 (Unit 2), RTS Overtemperature AT setpoint revision. .

• Amendments 57 (Unit 1) and 36 (Unit 2), RTS Overtemperature and Overpower AT time constants and Overtemperature AT setpoint.

Amendments 43 and 44 (Unit 1) and 23 and 24 (Unit 2), revised Overtemperature and Overpower AT trip setpoints and allowable values. '

7. WbAP-10271-P-A, Supplement 2,Rev.1, June 1990.

8. FSAR, Chapter,16.

9. Westinghouse Letter GP-16696, November 5, 1997. l Amedants (&HI)a,J (alla), m i d grs Intermediate Sy data Flay Soame Q Neutre> F/a6 and b6frip setpids and a//o*ble wfues.

1 Vogtle Units I and 2 8 3.3-60 Rev. 1-6/98

B 3.3.8 BASES- -

APPLICA81LITY' In MODES 1 and 2, E - --"-- - in:tr ::nt:ti:: i: .

(continued) d::n:rgi::d :nd operators are a'l;:rted e to an unplanned dilution event by a. reactor trip on overtemperature delta-T . I or power range neutron flux high, low setpoint, .

j respectively. As a protective measure in addition to HFASA,  ;

in MODE S with the loops not filled, unplanned dilution -

l events are precluded by requiring the unborated water source (reactor makeup water storage tank (RMWST)) to be isolated.

ACTIONS Ad 1

With one channel of HFASA inoperable, Required Action A.1 '

requires the inoperable channel to be restored within 48

. hours. In this condition, one channel of HFASA remains available to provide protection. The 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> Completion .

Time is consistent with that required for an inoperable source range channel.

B.1 and B.2 With the Required Action A.1 and associated Com>1etion Time not met, or with both channels of HFASA inoperasle, the appropriate ACTIONS are to verify that the required SDM is present and isolate the unborated water source by performing SR 3 9.2.1 This places the unit in a condition that precludes an unplanned dilution event. The Completion Times of I hour and once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter for verifying SDM provide timely assurance that no unintended dilution occurred while the HFASA was inoperable and that SDM is maintained. The' Completion Times of- 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and once per 14- ,

days thereafter for verifying that the unborated source'is '

isolated provide timely assurance that an unplanned dilution event cannot occur while the HFASA is_ inoperable and that this protection is maintained until the HFASA is restored.

SURVEILLANCE The HFASA channels are subject to a C0T and a CHANNEL REQUIREMENTS CALIBRATION.

7 .

n (continued)

Vogtle Units 1 and 2 B 3.3-172 Revision No. O __ .

& a w 4 m 2A.- A B a a 6 a + a 4 2 ,k - e, a1, y_ ,.

G e

.g ENCLOSURE 3 TYPED REVISED B ASES PAGES

1 -

• RTS Instrumentation B 3.3.1 4

BASES REFERENCES 2. FSAR,' Chapter 6.

' (continued)

3. FSAR, Chapter 15.

1 4. IEEE-279-1971.

5. 10 CFR 50.49.

4

6. WCAP-11269, Westinghouse Setpoint Methodology for Protection Systems;'as supplemented by:

Amendments 34 (Unit 1) and 14 (Unit 2), RTS Steam Generator Water Level - Low Low, ESFAS Turbine Trip and Feedwater Isolation SG Water

' Level - High High, and ESFAS AFW SG Water Level - Low Low.

+ Amendments 48 and 49 (Unit 1) and Amendments 27 and 28 (Unit 2), deletion of RTS Power Range Neutron Flux High Negative Re.te Trip.

4 Amendments 60 (Unit 1) and 39 (Unit 2), RTS j Overtemperature AT setpoint revision.

Amendments 57 (Unit 1) and 36 (Unit 2), RTS Overtemperature and Overpower AT time constants and Overtemperature AT setpoint.

Amendments 43 and 44 (Unit 1) and 23 and 24 (Unit 2), revised Overtemperature and Overpower AT trip i setpoints and allowable values. j

• Amendments Unit 1) and (Unit 2),

revised RTS'liiTer(mediate Range Neutron Flux, Source Range Neutron Flux, and P-6 trip setpoints and allowable values.

7. WCAP-10271-P-A, Supplement 2, Rev. ~1, June 1990.

l

8. FSAR, Chapter 16.

9. Westinghouse Letter GP-166S6, November 5, 1997.

l Vogtle Units 1 and 2 B 3.3-60 Revision No.

HFASA Instrumentation B 3.3.8

[ BASES

APPLICABILITY '.n MODES 1 and 2, operators are alerted to an unplanned l 1

(continued) dilution event by a reactor trip on overtemperature delta-T or power range neutron flux high, low setpoint, respectively. As a protective measure in addition to HFASA, i

in MODE 5 with the loops not filled, unplanned dilution events are arecluded by requiring the unborated water source

(reactor ma(eup water storage tank (RMWST)) to be isolated.

i

ACTIONS L1

! With one channel of HFASA inoperable, Required Action A.1 1 requires the inoperable channel to be restored within 48 I

' hours. In this condition, one channel of HFASA remains available to provide protection. The 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> Completion Time is consistent with that required for an inoperable 4

source range channel.

i B.1 and B.2 i

With the Required Action A.1 and associated Completion Time

! not met, or with both channels of HFASA inoperable, the .

appropriate ACTIONS are to verify that the required SDM is

present and isolate the unborated water source by performing

SR 3.9.2.1. This places the unit in a condition that precludes an unplanned dilution event. The Cogletion Times of I hour and once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter for verifying OM l provide timely assurance that no unintended dilution i occurred while the HFASA was inoperable and that SDM is 'g i maintained. The Completion Times of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and once per 14 days thereafter for verifying that the unborated source is isolated provide timely assurance that an unplanned dilution event cannot occur while the HFASA is inoperable and that this protection is maintained until tne HFASA is restored.

i SURVEILLANCE The HFASA channels are subject to a COT and a CHANNEL  !

REQUIREMENTS CALIBRATION.

(continued)

Vogtle Units 1 and 2 B 3.3-172 Revision No.

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