ML20211H758

Proposed Tech Specs Re Physical Mods to Turbine Bldg Cooling Water Header Isolation Logic

ML20211H758
Person / Time
Site:	Prairie Island
Issue date:	10/01/1997
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML20211H738	List: ML20211H732 ML20211H743 ML20211H758
References
NUDOCS 9710070116
Download: ML20211H758 (6)

Text

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ATTACHMENT 1 s

SUPPLEMENT to LICENSE AMENDMENT REQUEST DATED November 6,1996 Resubmittalgf Coolina Water System Technical Specification Amendments Appendix A, Technical Specification Pages Marked Up Pages as proposed in this Supplement (Deletions shown as strikethrough, additions shown as redline)

TS.4.5-3 (same as submitted November 6,1996)

TS.S.4-1 A

K 50 28 P

PDR,A

.j

TS.4.5-3 nr1 10t 2/E/01 B.

Component Tests 1.

Pumps The safety injection pumps, residual heat removal pumps and a.

containment spray pumpe shall tested pursuant to Specification 4.2.

Acceptable levels of performance shall be that the pumps start and reach their required developed head on minimum recirculation flow and the control board indications and visual observations indicate that the pumps are operating properly for at least 15 minutes, b.

A test consisting of a manually-initiated start of-each diesel engine, and assumption of load within one minute, shall be conducted monthly, c.

The vertical motor-driven cooling water pump shall be operated at-quarterly intervals. An acceptable level of performance shall be that the pump starts and reaches-its rewired developed head and the control-board indications and visual observations indicate that the pump is operating properly for at least 15 minutes.

2.

Containment Fan Motors The Containment Pan Coil Units shall be run on low motor speed for at least 15 minutes at intervals of one month. Motor current shall be measured and compared to the nominal current expected for the test conditions.

3, valves a.

The refueling water storage tank outlet valves shall be l

. tested in accordance with Section 4.2.

j b.

The accumulator check valves will be checked for OPERABILITY-during each refueling shutdown.

The boric acid tank valves to the Safety Injection System c.

shall be tested in accordance with section 4.2.

d.

The spray chemical additive tank valves shall be tested in accordance with Section 4.2.

e.

Actustion circuits for Cooling Water System valves ~that isolate non-essential equipment from the system shall be testedYeachYrefuelingToutage? in :::: din:: rith C:: tion 4, M Unit 114SIsactuation<circGitasfor Train'ArandFTrain a

-- v' alves o shall?bettested+ during EUnitilfrefuelingE outages.1 Unie -

21stractuationicircuitsPfor1TraintAtandiTrain Bj~ valves $shall, beltjetydJuring1Unig2[refuelingjou,tagesf"~

" ^ ~

f.

All motor-operated valves in the SIS, RHR, Containment Spray, Cooling Water, and Component Cooling Water System that are designed for operation during the safety injection or recirculation phase of emergency core cooling, shall be tested for OPERABILITY at each refueling shutdown.

i

r I

8 l

T8.5.4-1 R""9^ 11/it/95 E.4 ENGINEERED SAFETT FEATURES The engineered safety featuren include the containment system described in Specification 5.2, the emtrgency core cooling system, the containment air cooling system, the containment spray system, the post-accident com-bustible gas control system, emergency power supplies, component cooling water system, and the cooling water system. These systema are designed to l

applicable industry codes, the NRC General Design Criteria in Appendix A f

I to 10CFR50, and K;C. Safety Guides.

partievlar features for the prairie Island plant include the following:

1.

Several of the features are shared between the two units, including the onsite diesel generators, the cooling water system, and the motor driven pumps of the auxiliary feedwater system.

Shared systems are designed to mitigate the effects of an accident in one-unit and simultaneously provide for a hot shutdown in the other unit (Reference 1).

2.

The emergency cooling water pumps are driven by diesel engines.

These diesel engines are designed and will be tested to the same reliability criteria as those for the diesel generators that supply emergency electrical power (Reference 2).

3.

The cooling water system is automatically divided into two (2) redundant loops by motor-operated valves which are actuated by a l

safety injection signal. Branches serving non-safety related i

equipment in the turbine rooms are isolated from the class I cooling water loops by motor-operated valves.

These^

K1psKby[sn]S1[ signa 15yoiscidehtqWi @loWIheader; pre lv41ves Tar (

ssusejM b:::h: ir th::: 5::::h:: ::: :: ::d red th: met:: p:::::e v:1r::

2:tutt:d by in trun t hi 5 niter ::incid::t high !!:..

nd let p::::ur: ir th: :12 : : :: ling e:ter 1: ;:.

Reference 1.

FSAR, Table 1.2-2 2.

USAR, Section 10.4

ATTACHMENT 2 SUPPLEMENT to LICENSE AMENDMENT REQUEST DATED November 6,1996 Resubmittal of Coolina Water System Technical Specification Amendments Appendix A, Technical Specification Pages Revised Pages as proposed in this Supplement (Changes sidelined)

TS.4.5 3 l

TS.S.41 I

I l

i l

l e

h TS.4.5-3 l

l L

(

B.

Component Teste l

1.

Pumpa The safety injection pumps, residual heat removal pumps and a.

containment spray pumps shall tested pursuant to Specification 4.2.

Acceptable levels of performance shall j

be that the pumps start and reach their required developed I

head on minimum recirculation flow and the control board indications and visual obcervations indicate that the pumps 1

are operating properly for at least 15 minutes.

b.

A test consisting of a manually-initiated start of each diesel engine, and assumption of load within one minute, i

)

shall be conducted monthly.

The vertical motor-driven cooling water pump shall be c.

operated at quarterly intervals. An acceptable level of performance shall be that the pump starts and reaches its required developed head and the control board indi:ations and visual observations indicate that the pump is operating properly for at least 15 minutes.

2.

Containment Fan Motors The Containment Fan Coil Unite shall be run on low motor speed for at least 15 minutes at intervals of one month. Motor current shall be measured and compared to the nominal current expteted for the test conditions.

3.

Valves a.

The refueling water storage tank outlet valves shall be tested in accordance with Section 4.2.

b.

The accumulator check valves will be checked for OPERABILITY during each refueling shutdown, The boric acid tank valves to the Safety Injection System c.

shall be tested in accordance with Section 4.2.

d.

The spray chemical additive tank valves shall be tested in accordance with Section 4.2.

e.

Actuation circuits for Coo 11 v Water System valves that isolate non-essential equipment from the system shall be tested each refueling outage. Unit 1 SI actuation circuits for Train A and Train B valves shall be tested during Unit I refueling outages. Unit 2 SI actuation circuits for Train A and Train B valves shall be tested during Unit 2 refueling outages.

f.

All motor-operated valves in the SIS, RHR, Containment Spray, Cooling Water, and Component Cooling Water System that are designed for operation during the safety injection or recirculation phase of emergency core cooling, shall be tested for OPERABILITY at each refueling shutdown.

9 78.5.4-1 l

5.4 ENGINEERED SAFETY FEATURES The engineered safety features include the containment system described in Specification 5.2, the emergency core cooling system, the containment air cooling system, the containment spray system, the post-accident com-bustible gas control system, emergency power supplieu, component cooling water system, and the cooling water system. These systems are designed to applicable industry codes, the NRC General Design Criteria in Appendix A to 10CFR50, and NRC Safety Guides.

Particular features for the Prairie Island plant include the following:

1.

Several of the features are shared between the two units, including the onsite diesel generators, the cooling water system, and the motor-driven pumps of the auxiliary feedwater system.

l Shared systems are designed to mitigate the effects of an accident in one unit and simultaneously provide for a hot shutdown in the other unit (Reference 1).

2.

The emergency cooling water pumps are draven by diesel engines.

These diesel engines are designed and will be tested to the same reliability criteria as those for the diesel generators that supply emergency electrical power (Reference 2).

3.

The cooling water system is automatically divided into two (2) redundant loops by motor-operated valves which are actuated by a safety injection signal. Branches serving non-safety related equipment in the turbine rooms are isolated from the class I cooling water loops by motor-operated valves. These valves are closed by an SI signal coincident with low header pressure.

Reference j

1.

FSAR, Table 1.2-2 2.

USAR, Section 10.4