ML20058L834

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Forwards SSAR Markup Addressing Draft Final SER Confirmatory Item 6.2.5-3,supplementing
ML20058L834
Person / Time
Site: 05200001
Issue date: 05/07/1993
From: Fox J
GENERAL ELECTRIC CO.
To: Poslusny C
Office of Nuclear Reactor Regulation
References
NUDOCS 9305130017
Download: ML20058L834 (5)


Text

_ _.

GENuclexrEnergy Genera! Electric company.

175 Curtner Avenue. S?n Jose, CA 95125 l

i May 7,1993 36cket No. STN 52-001 f

l t

t i

Chet Poslusny, Senior Project Manager j

Standardization Project Directorate '

Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation I

t

Subject:

Submittal Supporting Accelerated ABWR Review Schedule - DFSER Confirmatory item 6.2.5-3

Dear Chet:

Enclosed is a SSAR markup addressing DFSER Confirmatory Item 6.2.5-3 which supplements i

my letter dated March 3,1993.

I Please provide a copy of this transmittal to Butch Burton.

Sincerely, i

Y A

i

, ack Fox i

Advanced Reactor Programs I

cc: Norman Fletcher (DOE) i Bernie Genetti(GE) q i

i i

JF93-D9

- 9305130017 930507 7

PDR. ADOCK 05200001 '

A

- PDR

C' W F tr1 (,,2. p. 3 y) of y

\\

23A6100AE Standard Plant

%n Table 3.9-8 (Continued)

)

IN-SERVICE TESTING SAFETY-REIATED PUMPS AND VALVES T22 Standby Gas Treatment System Valves Safety Code Valve Test Test SSAR Class Cat.

Func. Para Freq. Fig.

No. Qty Description (h)(1)

(a)

(c)

(d)

(e)

(f)

(g)

F012 2 Fdter train DOP sampling line valve 3

B P

El 6.5-1(2,3)

-[

downstream of after HEPA 7

F014 2 STGS sample line valve 3

B P

El 6.5-1(2,3)

F015 2 PRM discharge to stack valve 3

B P

El 6.5-1(2,3)

)

F500 2 Filter unit vent 1;ne valve 3

B P

El 6.5-1(2,3)

F501 2 Filter unit drain line valve 3

B P

El 6.5-1(2,3)

F504 2 Filter unit vent line valve 3

B P

El 63-1(2,3) i F505 2 Exhaust fan vent line valve 3

B P

El 6.5-1(2,3)

F506 2 Fdter train vent line valve 3

B P

El 6.5-1(2,3)

F507 2 Futer train vent line valve 3

B P

El 65-1(2,3)

(

Ff98 2 Filter train vent line valve 3

B P

El 65-1(2,3)'

F509 2 Fdter train vent line valve 3

B P

El 6.5-1(2,3)

F510 2 Filter train vent line valve 3

B P

El 65-1(2,3)

F511 2 Exhaust stack drain line valve 3

B P

El 65-1(2,3)

F700 2 Fdter unit demister dp instrument line valve 3

B P

El 6.5-1(2,3)

F701 2 Filter unit demister dp instrument line valve 3

.B P

El 6.5-1(2,3)

F705 2 Fdter train prefilter dp instrument line valve 3

B P

El 6.5-1(2,3)

F706 2 Filter train prefilterdp instrument line valve 3

B P

El 6.5-1(2,3)

F707 2 Filter train preHEPA dp instrument line valve 3 B

-P El 6.5-1(2,3)

(

F708 2 Filter train preHEPA dp instrument line valve 3 B

P El 6.5-1(2,3)

F709 2 Fliter train charcoal adsorber dp inst. line viv 3 B

'P El 6.5-1(2,3)

L F710 2 Filter train charcoal adsorber dp inst line viv 3

B P

El 6.5-1(2,3).

/

F711 2 Filter train after HEPA dp inst line valve 3

B P

El 63-1(2,3) b i

F712 2 Fdter train after HEPA dp inst line valve 3

B P

El 6.5-1(2,3) 1 I

F713 2 Fiher train exhaust flow instrument line valve 3 B

P El 6.5-1(2,3)

F714 2 Fdter train exhaust flow instrument line valve 3 B

P El 65-1(2,3)

T31 Atmospheric Control System Valves (h2),

2 6.2 39(1) t A

1,A L,P F001 1 N2 supply line from Reactor Building HVACg

& yrsRD l

S 2

6.2-39(1)

F002 1 N2 supply line to drywell inboard cont-2 A

1,A 1,P

@>Ts RO

(

ainment isoaltion valve [h 2)

S F003 1 N2 supply line to wetwell inboard cont-2 A

1,A L,P 2 yrs 6.2-39(1) ainment isoaltion valve (/, 2)

S

@$RO l

2 6.2-39(1)

F004 1 Containment atmosphere exhaust line from -

2 A

1,A 1,P

@ yrsRD

/

drywellisoaltion valvefh 2]

S F005 1 Drywell atmosphere exhaust line valve 2

A 1,A 1,P 2 yrs 6.2-39(1)

S 3 mo T31-FD04 bypass line F006 1 Containment atmosphere exhaust line form 2

A 1,A L,P 2 yrs 6.2-39(1) wetwellisolation valve (6 f)

S QRO l

F007 1 Wetwell overpressure line valve 2

A P

L,P 2 yrs 6.2-39(1) 3.9 5827-Amendment)(

a

~

enin sa.s.3 ep p

. gg 23A6100AE Standard Plant wa Table 3.9-8 (Continued)

IN-SERVICE TESTING SAFETY-RELATED PUMPS AND VALVES T31 Atmospheric Control System Valves Safety Code Valve Test Test SSAR Class Cat. Fune. Para Farq. Fig..

No-Qty Description (h)(1)

(a)

(c)

(d)

(e)

(r)

(g) 1 Containment atmosphere exhaust line 2

A I,A L,P di$go.2-39(1) 2 yrs 6 l F008 to SOTS (h t)

S 1

Containment atmosphere exhaust line to 2

A I,A L,P 2

6.2-39(1) l F009 R/B HVAC(h 2)

, A P

L,P 2 yrs 6.2-39(1)

S m

RO F010 1 Drywelloverpressure line valve 2

NF025 1 N2 supply line from K-5 outboard cont-2 A

I,A L,P 2 yrs 6.2-39(1) ainment isolation valve S

3 mo FD39 1 N2 supply line from K 5 outboard cont-2 A

I,A L,P 2yis 6.2-39(1) ainment isolation valve S

3mo F040 1 N2 supply line from K 5 to drywellinboard 2

A I,A L,P 2 yrs 6.2-39(1) isolation valve S

3mo F041 1 N2 supply line from K-5 to wetwell inboard 2

A I,A L,P 2 yrs - 6.2-39(1) isolation valve S

3mo F044 8 Drywell/wetwell vacuum breaker valve 2

C A

P RO 6.2-39(2)

R E3 F050 1 N2 supply line to drywell test line valve 2

B P

E1.

6.2-39(1)

FD51 1 Cor.tainment atmosphere exhaust line test 2

B P

El 6.2-39(1) line valve F054 1 Drywell personnel air lock hatch test 2

B P

El 6.2-39(2) line valve FOSS 1 N2 supply line from test line valve 2

B P

El 6.2-39(1)

F056 1 Wetwell personnel air lock hatch test 2

B P

El 6.2-39(2) line valve F700 1 N2 supplyline to drywell FE upstream 2

B P

El 6.2-39(1) instru: nest line F701 1 N2 supply line to drywell FE downstream 2

B P

El 6.2-39(1) instrument line F702 1 N2 supplyline to wetwell FE upstream 2

B P

El 6.2-39(1) instrument line F703 1 N2 supply line to wetwell FE downstream 2

B P

El 6.2-39(1) mstrument line F720 8 DW/WW vacuum breaker valve N2 supply 2

A I,P L

RO 6.2-39(2) lineisolation valve F730 1 Drywell pressure instrument line isolation 2

B P

El 6.2-39(2) valve F731 1 Drywell pressure instrument line solenoid 2

A I,P L,P RO 6.2-39(2) isolation valve F732 2 Drywell pressure instrument line valve 2

B P

El 6.2-39(2)

F733 2 Drywell pressure instrument line solenoid 2

A I,P L,P RO 6 2-39(2) isolation valve F734 4 Drywell pressure instrument line for NBS 2

B P

.El 6.2 39(2) valve N Poil I Johe co SG TS (h 2)yhe,e ohnst eimfaineheirf rhm 2

A IA L,P

.2 W1 6.2-]q(s)

S RO 3,

ue,e emp

CNFm 6

  • 9.S 3 - 0 f Af

^

~

ggig

- Rev c Standard Plant (16) The primary containment purge system will required, through a pathway from the wetwell l

aid in the long-term post-accident cleanup airspace to the stack. The pathway is isolated operation. The primary containment during normal operation with two rupture disks.

-l atmosphere will be purged through the SGTS ge$

l to the outside environment. Nitrogen makeup The following modes of operation are provided:

f will be available during the purging operation.

(1) Startup - Inerting. Liquid nitrogen is j

vaporized with steam or electric heaters to (17) The system is also designed to release a temperature greater than 200F and is containment pressure before uncontrolled injected into the wetwell and the drywell.

i containment failure could occur.

The nitrogen will be mixed with the primary containment atmosphere by the drywell j

6.2.5.2 System Design coolers in the drywell and, if necessary, by the sprays in the wetwell.

I 6.2.5.2.1 General (2) Normal - Maintenance of Inert Condition. A l

The ACS provides control over hydrogen and nitrogen makeup system automatically sup-oxygen generated following a LOCA. In an inerted plies nitrogen to the wetwell and upper f

containment, mixing of any hydrogen generated is drywell to maintain a slightly positive not required. Any oxygen evolution from pressure in the drywell and wetwell to pre-l radiolysis is very slow such that natural clude air leakage from the secondary to the l

convection and molecular diffusion is sufficient primary containment. An increase in con-l to provide mixing. Spray operation will provide -

tai ament pressure is controlled by venting (2}

furth:r assurance that the drywell or wetwell is through the drywell bleed line.

uniformly mixed. The system consists of the l

following features:

(3) Shutdown - Deinerting. Air is provided to the drywell and wetwell by the primary j

(1) Atmospheric mixing is achieved by natural containment HVAC purge supply fanc Exhaust processes. Mixing will be enhanced by is through the' drywell, exhaust lines and utA j

operation of the containment sprays, which Mwetwelpto the plant vent, through the H\\

L or SGT as required. sustar A I

1 are used to control pressure in the primary

. c1hnsf)Iarts l

containment.

(4) Overpressure Protection. If the wetwell.

l (2) The piimary containment nitrogen purge pressure increases to about 5.6

)

2 establishes and maintains an oxygen -

kg/cm g. the rupture disks will open.

deficient atmosphere (13.$ volume percent)

The overall containment pressure decreases in the primary containment during normal as venting continues. Later, the operators operation.

can close the two 350A air-operated j

butterfly valves to re-establish j

(3) The redundant oxygen analyzer system (CAMS) containment isolation as required.

measures oxygen in the drywell and suppression chamber. Oxygen concentration The following interfaces with other systems are displayed in the main control room, are provided:

Description of safety-related display instrumentation for containment monitoring (1) Residual Heat Removal System (RHR-Ell),

is provi,ded in Chapter 7.

Electrical.

The RHR provides post-accident suppression requirements for equipment associated with pool cooling as necessary_ following heat the combustible gas control system are in dumps to the pool, including the exothermic accordance with the appropriate IEEE heat of reaction released by the design.

standards as referenced in Chapter 7.

basis metal-water reaction. This heat of reaction is very small and has no real In addition, the ACS provides overpressure affect on pool temperature or RHR heat' protection to relieve containment pressure, as exchanger sizing. The wetwell spray IW5 W A

)

Ammendment[

9uRIVq Clwldmson f Uqe -W povIdes c$$31nmed acces/

}

6.2-33 Ven H la fion.

I i

.=-.-.

-.w

i enn u.m y n ABWR

~

Standard Plant REV C l

differentials and flow rates, are documented monitored. Low makeup vaporizer nitrogen outlet during the preoperational tests and are used as temperature alarms (only) in the main control Auxiliary steam feeding the main inerting base points for measurements in subsequent room.

operational tests.

vaporizer (s) is controlled to regulate the inerting vaporizer nitrogen outlet temper -

During plant operation, the ACS, its valves, ature. Low inerting vaporizer nitrogen outlet instrumentation, wiring and other components temperature sounds a local alarm and low low outside the containment can be inspected visually temperature isolates the main inerting line. It at any time. Testing frequencies of the ACS com-is intended that the local panel be attended ponents aie generally correlated with testing full-time during all main inerting operations.

frequencies of the associated controls and in-All locally-mounted instruments are easily read strumentation. When a valve control is tested, from the local ACS panel. Keylocked switches in the operability of that valve and its associated the main control room are provided to override instrumentation are generally tested by the same the containment isolation signal to the valves action. In addition, inservice inspectiongf all providing nitrogen makeup to the drywell and and ASME, Section 111, Class 3 com nents is done in wetwell and the small 50 mm drywell vent line. I

  • "7 accordance with Subsection 6.6.

cyng 7.</4 Position indication in the main control room is respectheh, provided for all remotely-operated valves.

f Preoperational tests of the combustible gas control system are conducted during the final Backup purge and the addition of makeup stages of plant construction prior to initial nitrogen is initiated at t he oper ator's startup.

discretion.

The overpressure protection concept was Design d e t ails and logic of the designed to minimize any adverse impact on normal instrumentation is discussed in Chapter 7.

operation or maintenance. Initially, several rupture disks from a batch of rupture disks could As discussed in Section 6.2.5.2, safety-grade be tested to verify the opening characteristics oxygen monitoring is provided in the wetwell and and setpoint. The disks would be replaced every drywell by the CAMS. This monitoring function five years according to normal industry practice. is not used for normal operation. Separate The installation of the disks would not impact oxygen monitoring is included in the ACS for use containment leakage tests, since disk integrity is during non accident plant operation to determine expected to be essentially perfect.

when the primary containment is inert and nitrogen purging may be terminated and when the The rnerprenue protection valves would be primery containment is de inened a::d pencenel tested during preoperational testing and re-entry procedures may be initiated.

periodically during surveillance testing to verify their normally open position and their ability to The ACS oxygen monitors for assuring safe close using AC power and pneumatic air.

personnel entry and an inert condition during startup, normal, and abnormal operating 6.2.5.5 Instrumentation Requirements conditions have a range from 0 to 25 percent at 100 percent relative humidity. The maximum and Separate inerting flow indication to both the minimum inlet temperature to the oxygen monitor drywell and wetwell are provided. Drywell will be 10 and 650C, respectively. Two sample pressure and makeup flow are monitored and points are provided in both the drywell and recorded in the main control room. Additional wetwell, high and low in their respective drywell pressure instrumentation, with a lower compartments and in opposing quadrants. Each setpoint, provided in addition to the redundant, airlock is also sampled.

safety-grade drywell pressure instrumentation of i

the nuclear boiler system, if drywell pressure The sample lines are sized and sloped to exceeds a given setpoint, the makeup and inerting assure draining condensation to the containment.

i valves are closed. The temperature of the makeup and inerting vaporizers nitrogen outlet are Amendmem[

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