ML20006A465

Proposed Tech Specs Re HPSI Throttle & Pressurizer Auxiliary Spray Mods & Surveillance Requirements for ECCS

ML20006A465
Person / Time
Site:	Yankee Rowe
Issue date:	01/18/1990
From:	YANKEE ATOMIC ELECTRIC CO.
To:
Shared Package
ML20006A463	List: ML20006A462 ML20006A465
References
NUDOCS 9001260291
Download: ML20006A465 (7)

Text

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b PROPOSED HPSI THROTTLE AND PZR. AUX. SPRAY MODS.

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_A PROPOSED HPSI

' THROTTLE VALVES

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l PUMPS i

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$1 MOV N

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> -CONTAI MENT 1

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REClRCUL ATION CS MOV l 535

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PUMPS (3) l

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OUTSIDE VC

=4 INSIDE VC L-h j l

56 M

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-517 M k I

SI MOV-514 F SI MOV 515 y

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l SPRAY ST

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PZR I

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AUX.

HOT LEO

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RECIRC.

i SPRAY CHARGING h.

LINE VALVES l

PUMPS

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l CH-MOV 550 l

e CH MOV-l M

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NORMAL CHAR 0!NO LINE T

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PROPOSED

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CHARGING O

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1. 4 HOT I ISOLATION VALVE PROPOSED CHANGE 232 SKETCH A 9001260291 900118 DR,.ADOCK0500g9 33,4'

g, EURVEI11ANCE REQUIREMENTS j

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4.5.2 Each ECCS' safety injection subsystem, the recirculation subsystem, and the long-term hot leg injtetion subsystem shall be demonstrated OPERABLE:

a.

At least once per 31 days on a STAGGERED TEST BASIS by:

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1.

Verifying that each high pressure safety injection pump:

i a)

Starts (unless already operating) from the control room.

b)

Develops a discharge pressure of 1 850 psig on recirculation flow to the safety injection tank.

c)

Operates for at least 15 minutes.

r 2.

Verifying that each low pressure safety injection pump:

a)

Starts (unless already operating) from the control room.

i b)

Develops a discharge pressure of 1 250 psig on recirculation flow through CS-MOV-532.

c)

Operates for at least 15 minutes.

b.

At least once per 31 days by:

1.

Verifying that the following valves are in the indicated positions with power to the valve operators removed by opening at least two breakers in series:

Valve Namber Valve Function Valve Position a..

CH-MOV-522 a.

Charging Header /LPSI a.

Closed Isolation 1

YANKEE-ROWE 3/4 5-4 Amendment No. 35, 51, 92

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EMERGENCY CORE COOLING SYSTEMS i

SURVEILLANCE REQUIREMENTS (Continued) 3.

Verifying that the following valves are in their normally closed position with power to the valve operator removed by disconnecting the power cables as they leave the motor starters Valve Number Valve Function b.

CS-MOV-534 LPSI Pump Header Isolation Valve Bypass i

4.

Verifying that the following valves are in their nornal position with power to the valve operator motors separated by dual contactors from the motor control center:

Nornal Valve Number Valve Function Position a.

CS-MOV-532 LPSI Recirculation Line Closed b.

CS-MOV-533 LPS1 Pump Header Isolation Open c.

CS-MOV-535 LPSI Pump Header Isolation Open i

d.

SI-MOV-518 HPSI and LPSI Pump Header Suction Isolation Open e.

SI-MOV-48 HPSI and LPSI Minimum Recirculation Line Open f.

SI-MOV-49 HPSI and LPSI Minimum Recirculation Line Open g.

SI-MOV-515 Hot Leg Injection Isolation Closed h.

SI-MOV-514 Hot Leg Injection Isolation closed

i. SI-MOV-516 V.C. Sump Isolation Closed J.

SI-MOV-517 V.C. Sump Isolation Closed k.

SI-MOV-46 HPSI Isolation Open 1.

SI-MOV-4 LPSI Pump Crossover to HPSI Pump Open m.

CS-MOV-536 SI Header Isolation to Cold Leg Open n.

CS-MOV-537 SI Header Isolation to Cold Leg Open o.

CS-MOV-538 SI Header Isolation to Cold Leg Open p.

CS-MOV-539 SI Header Isolation to Cold Leg Open q.

MC-MOV-301 MCS Loop Isolation Open r.

MC-MOV-302*

MCS Loop Isolation Open s.

MC-M0V-309 MCS Loop Isolation Open t.

MC-MOV-310*

MCS Loop Isolation Open u.

MC-MOV-318*

MCS Loop Isolation Open v.

MC-MOV-319 MCS Loop Isolation Open w.

MC-MOV-325 MCS Loop Isolation Open x.

MC-MOV-326*

MCS Loop Isolation Open

• In Modes 2, 3*,

4*,

5*, MCS loop isolation valves are required to be closed for main coolant pump (s) starting. After the pump (s) have been started, the valve (s) shall be reopened.

YANKEE-ROWE-3/4 5-6 Amendment No. 49, 52, 69, 77, 101 x

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t EMERCENCY CORE COOLING SYSTEMS l'

EURVE11.1ANCE REQUIREMEh"I'S (Continued) y.

SI-MOV-519 HPSI Flow Control Open z.

SI-MOV-520 HPSI Flow Control Closed aa. CH-MOV-524 Charging Line Isolation Open bb. CH-MOV-550 Charging Line Isolation open e

CS-MOV-532 may be opened for 1 20 minutes per week for safety 1

Note injection tank mixing or low pressure safety injection pamp testing.

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YANKEE-ROWE 3/4 5-6a Amendment No. 49, 52, 59, 77, 101

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.c EMERGENCY CORE COOLING SYSTEMS r

M EOUIREMENTS (Continue ()

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5.

Verifying that each ECCS safety injection subsystem is aligned to receive electrical power from an OPERABLE emergency bus.

I 6.

Verifying that each pair of ECCS recirculation subsystem redundant valves is aligned to receive electrical power from separate OPERABLE buses.

t 7.

Verifying that each pair of ECCS long-term hot leg injection subsystem redundant valves is aligned to receive electrical L

power from separate OPERABLE buses.

L 8.

Verifying that the charging header flow metering instrument is OPERABLE by observing charging flow rate at least once per 12

. hours.

9.

Verifying that the redundant HPSI header isolation / flow control valves are aligned to receive electrical power from separate OPERABLE buses.

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10. Verifying that the redundant charging line isolation valves are i

aligned to receive power from separate OPERABLE buses.

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'11. Verifying that redundant pressurizer auxiliary spray flow control valves are aligned to receive power from separate OPERABLE buses.

i c.

By a visual inspection which verifies that no loose debris (rags, trash, clothing, etc.) is present in the containment which could be l

transported to the containment sump acd cause restriction of the pump suctions during LOCA conditions. This visual inspection shall be performed:

1.

For all accessible areas _of the containment prior to establishing containment integrity, and 2.

Of the areas affected within containment at the completion of each containment entry when containment integrity is established.

d.

At least once per 18 months by visual inspection of the containment sump and verifying that the subsystem suction inlets are not restricted by debris and that the sump components (trash-racks, screens, etc.) show no evidence of structural distress or corrosion.

e.

At least once per 18 months, during shutdown, by:

1.

Cycling each power-operated valve in the flow path through at least one complete cycle of full travel.

2.

Verifying that valve CS-MOV-532 actuates to its correct position on a safety injection signal.

YANKEE-RDWE 3/4 5-7 Amendment No. 52, 77, 82

b);

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EMERGENCY CORE _ COOLING SYSTEMS EURVEfl1ANCE REOUIREMENTS (Continued) 3.-

Verifying that each of the following pumps start automatically upon receipt of a safety injection signalt H

(a): High Pressure Safety Injection (HPSI) pump (b) ' Low Pressure Safety Injection (LPSI) pump p

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t YANKEE-ROWE 3/4 5-7a Amendment No. 52, 77, 82

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' EMERGENCY CORE COOLING SYSTEMS j

I EURVEII.IANCE RRnUIREMENTS (Continued) 4.

Verifying the proper positioning of hot leg injection throttle i

valve SI-V-645.

i S.

Verifying that each charging pump stops automatically upon receipt

'of a' safety injection signal.

i 6.

Verifying that the charging heads flow metering instrument is OPERABLE by perfor:ning a CHANNEL CALIBRATION.

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7.

Verifying the proper positioning of the HPSI throttle valves SI-V-671, 672, 673, and 674 by performing an inspection to ensure i

that:

(a)

Each valve locking device is in place and securely welded to the valve handle and to the valve yoke.

(b)

The scribe mark on each valve body aligns with the scribe mark on the valve yoke.

f.

=During shutdown following completion of the modifications to the ECCS subsystems that alter the subsystem flow characteristics and/or any time either test under 4.5.2.e.7 is failed, by developing a backpressure of 875 psig in the high pressure safety injection header with two HPSI pumps operating as follows:

1.

Pressure to the suction of the HPSI pumps to be 170 ! 10 psi.

2.

LPSI flow is isolated.

3.

Injection flow is to one loop with the other loops isolated by closing the appropriate injection gate valves CS-MOV-536, CS-MOV-537, CS-MOV-538, and CS-MOV-539.

-1 4.

The flow to the injection loops shall not be less than 200 gpm.

5.

The above test shall be repeated to include the operation of all HPSI pumps.

g.

Durin8 shutdown following completion of modifications to the ECCS subsystems that alter the subsystem flow characteristics as follows:

1.

For the Low Pressure Safety Injection (LPSI) pumps, verify that all combinations of two pumps develop a combined flow 1 2180 gpm.

2.

For the hot leg injection line, verify the proper positioning of throttle valve SI-V-645 by flow testing.

3.

For the pressurizer auxiliary soray line verify system performance by flow testing.

YANKEE-ROWE 3/4 5-8 Amendment No. 77, 83, 87