ML20045H688
| ML20045H688 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 07/15/1993 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Poslusny C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9307210125 | |
| Download: ML20045H688 (7) | |
Text
fccNl GENuclearEnergy 0
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~n n C,enera!Electnt Company 17b Contrer Avenue. San Jose. CA 95125 July 15,1993 Docket No. STN 52-001 Chet Poslusny, Senior Project Manager Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation
Subject:
Submittal Supporting Accelerated ABWR Schedule - Potable and Sanitary Water System Clarifications
Dear Chet:
Enclosed is a SSAR markup clarifying the in/out of scope portions of the Potable and Sanitary Water (PSW) System as was requested in the ITAAC questions and during our July 14,1993 conference call. This change will be included in Amendment 32 scheduled for August 31,1993.
As I indicated in the call, there will be no Tier 1 entry for the PSW System except for the interface requirements.
Please provide a copy of this transmittal to Butch Burton.
Sincerely, f
.c
- ek Fox Advanced Reactor Programs cc: Alan Beard (GE)
Norman Fletcher (DOE)
Tony James (GE)
Gail Miller (GE) i num 1.901<w
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. ABWR 23^ matt Standard Plant Rev.B 9.2. WATER SYSTEMS rixtures located in areas with no sources of potentially radioactive wastes and conveys them 9.2.1 Station Servlee Water System to a sewage treatment facility.
The functions normally performed by the (1) The PSW includes a sewage treatment system station service water system are performed by the which treats sanitary waste using the activated systems discussed in Subsection 9.2.11.
sludge biological treatment process. The aeration tanks are capable of receiving waste at 9.2.2 Closed Cooling Water System a rate between 12,000 gpd and 48,800 gpd.
The functions normally performed by the closed (5) The PSW system shall be designed with no cooling water system are performed by the systems interconnections with systems having the discussed in Subsections 9.2.11, 9.2.12, 9.2.13, potential for containing radioactive materials.
and 9.2.14 Protection shall be provided through the use of air gaps, where necessary.
9.2.3 Demineralized Water Makeup 9 2. 9. 2 3' System 9'Mogystem Description (Conceptual Design)
The functions normally performed by the demin-The PSW system includes a potable water system, eralized water makeup system are performed by a sanitary drainage system and a sewage treatment the systems discussed in Subsections 9.2.8,9.2.9 and system.
9.2.10.
g.2 9JM GM*1 Potable Water System 4
9.2.4 Potable and Sanitary Water System (PSW)
Filtered water flows by gravity from the filtered y
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water storage tank of the MWP system into a potable g
s subsection providEs a conceptual design of water storage tank. A hypochlorite addition pump the potable and sanitary water (PSW) as required and tank are provided which adds sodium by 10CFR52. The interface requirements for thi hypochlorite to the water entering the potable water system are part of the desirm certification. A storage tank. Two potable water pumps send water separate portion of the PSW, the non radioactive from the potable water storage tank to a h -- drains,is described in Subsection 933.
hydropneumatic pressure tank. A hydropneumatic Q.7,.t{.7., \\
pressure tank and air compressor are provided to
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442Al Safety Design Bases (Interface maintain adequate pressure within a potable water g
Requirements) distribution piping system. Potable water is sent to a heater where it is heated and distributed throughout The PSW system has no safety-related function.
the plant.
Failure of the system does not compromise any q.2.V.r.3.2.
safety-related system or component, nor does it 9A+3:2 Sanitary Drainage System p
prevent a safe shutdown of the plant, q,'t,4 1,,'2.
The sanitary drainage system collects liquid wastes M+2 Power Generation Design Ilases (Interface and conveys them to the sewage treatment system.
4 Requirements)
This system is installed in accordance with ANSI A40.8. National Plumbing Code, and applicable local (1) The PSW system is designed to provide to all or state codes.
buildings a minimum of 200 gpm of potable q.2.(,2.'I I water during peak demand periods.
9.3.4&S Sewage Treatment System g
(2) Potable water is filtered and treated to prevent The sewage treatment system is a concrete harmful physiological effects on plant structure containing several compartments. The personnel.
sewage treatment systems uses the activated sludge biological treatment process. The system includes a (3) The PSW includes a sanitary drainage system comminutor with a bypass screen channel, two which is designed to collect liquid wastes and aeration tanks, three final clarifiers, one chlorine entrained solids discharged by all plumbing contact tank, two aerobic digesters, three air blowers, Amendment 30 9.2-1
- = --
I 23A6100AH Standard Plant nev, n a froth spray pump, a hypochlorite pump and to being discharged via the cooling tower blowdown relat'ed equipment. The system can be operated in line. The settled sludge is sent to the aerobic j
two modes: extended aeration and contact digesters and disposed of off-site.
stabilization.
9,7Me14 Z.
8f.Z.4,I.i 112.M4 Abnormal Operation A4.M System Operation (Conceptual Design) 0q,tN.L9.1 The components of the PSW system are designed a.a.Mel Normal Operation to meet the increased needs during refueling 4
operations when additional people are on-site.
The potable water pumps take water from the potable water storage tank and discharges it into The sewage treatment system may be operated in the potable water hydropneumatic pressure tank.
the contact stabilization mode to process the Under automatic control, a' low pressure switch substantially higher waste water flow rates during i
starts one of the two potable water pumps when outages. In this mode, a portion of the settled sludge the hydropneumatic pressure tank water pressure from the final clarifiers is aerated, sent to the aera-falls below a specified limit. A pressure switch tion tanks and mixed with incoming sewage.
automatically starts the second potable water pump 9 14I.7 when a single pump is unable to maintain the tank S 449 Evaluation of Potable and Sanitary Water 3
pressure above a specified limit. When water level System Perfonnance (Interface Requirements) reaches a specified high level in the hydro-pneumatic pressure tank, a level switch auto.
The COL applicant shall analyze the PSW system matically stops the potable water pumps. If high to assure that the system meets all applicable regula.
water level in the pressure tank is reached and the tory requirements and is compatib!c with site condi-tank pressure is low, the air compressor is auto-tions.
matically started and is stopped at a specified 9 2.N.I. b pressure by a high pressure switch.
2.3.4.6 Safety Evaluation (Interface Requirements) 3 The air compressor controls are interlocked The PSW system has no interconnections with I'
with the potable water pump controls so that the systems having the potential for containing air compressor may operate only when the pumps radioactive materials. Protection includes, where are stopped and the hydropneumatic pressure tank necessary, the use of air gaps.
water level is at the specified high limit.
Cf,2. Y.7.7 Sea.Mgnstnamentation and Alarms (Interface Downstream of the hydropneumatic pressure Requirements tank, a branch sends potable water to a heater and
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a hot water distribution system.
p The subsystems of the PSW system are provided with control panels located in the controi building Potable water is used to flush the service water which are designed for remote manual and sides of the RSW and TSW beat exchangers automatic control of the processes.
whenever they are put into a wet standby condition.
A flow proportioning controller is used to operate Normally, the sewage treatment system is the hypochlorinator pump as water enters the PSW operated in the extended aeration mode. The system. Pressure and level switches are provided to sanitary wastes enter the sewage treatment system start and stop the potable water pumps and the air via the comminutor,in which any solids are shred-compressor. Low bydropneumatic tank pressure is ded, and flows into the aeration tanks. In the aera-alarmed. Low levelin the hypochlorite feed tank is tion tanks, the waste liquids are continuously alarmed.
aerated. Occasionally, foaming occurs in the aeration tanks. A froth spray system is provided The minimum instrumentation requirements for which uses processed sewage to control any froth the sewage treatment system are a treated effluent i
which is present. The aeration tank contents are sewage flow meter and a common air blower then transfeurd to the clarifiers where the sludge discharge pressure gage.
is allowed to settle. The clarified sewage passes into the chlorine contact tank for chlorination prior Amendment 30 9.2-1.t i
j j
l i
ABM u x6toosii Standard Plant nem n 9.,1.4.1.0 44redi Tests and Inspections (Interface g
Rrquirements)
Drainage piping is hydrostatically tested to the Amendment 30 9.21.1.1 4
A 9.2.4.1 Portions within Scope of ABWR Standard Plant Those portions of the Potable and Sanitary Water (PSW) system that are within the Standard Plant buildings (Subsection 1.1.2) are in the scope of the ABWR Standard Plant and are described in Subsections 9.2.4.1.1 through 9.2.4.1.6.
All ponions of the PSW system which are outside the Standard Plant buildings are not in the scope of the ABWR Standard Plant.
6 9.2.4.1.1 Safety Design Bases The PSW system has no safety-ratated function. Failure of the system does not compromise any safety-related system or component, nor does it prevent a safe shutdown of the plant.
9.2.4.1.2 Power Generation Design Bases The PSW system shall be designed with no interconnections with systems having the potential for containing radioactive materials. Protection shall be provided though the use of air gaps, where necessary.
9.2.4.13 System Description F he PSW system is a hot and cold potable water distribution system. It includes t
ilves, instrumentation, sinks, toilets and cther facilities.
The PSW system includes a sanitary drainage system which is designed to collect liquid wastes and entrained solids discharged by all plumbing fixtures located in the Standard Plant buildings form areas with no sources of potentially radioactive wastes and conveys them to a sewage treatment fa:ility.
Potable water is provided to flush the service water sides of the RSW and TSW heat exchangers whenever they are put into a wet standby condition.
9.2.4.1.4 Safety Evaluation The PSW system has no interconnections with systems having the potential for containing radioactive materials.
9.2.41.5 Instrumentation and ^jarms k
I3 codthu.ed
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The subsystems of the PSW system are provided with control panels located in the control building which are designed for remote manual and automatic control of the processes.
i 9.2.4.1.6 Tests and Inspections An integrity test is performed on the PSW system upon completion of construction and before putting the system into operation.
The operability of the P5 W system is demonstrated by use during normal system operation.
9.2.4.2 Portions Outside the Scope of ABWR Standard Plant All portions of the PSW system which are outside the Standard Plant buildings are not in the scope of the ABWR Standard Plant. Subsections 9.2.4.2.1 through 9.2.4.2.8 provide conceptual design of these portions of the PSW as required by 10CFR52. The interface requirements for this system are part of the design certification.
The portions of the PSW system which are not in the scope of the ABWR Standard Plant sha'l meet all requirements in Subsection 9.2.4.1.1 through 9.2.4.1.6 and all following requiremets. The following subsection provides a conceptual design and interface tegi.irements for these portions of the PSW system and are a pan of the design certification.
U-
.y c-HOT WATER SYSTEM m
k E
il V
E R
p j
m E
FILTERED l POTABLE POTABLE HYDRO-SEWAGE 1
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WATER l Ik >
WATER WATER PNEU.
USERS DRAINAGE m
l TANK j.
TANK PUMP (2)
TANK SYSTEM ET E
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AIR TANK &
COMP-
-PUMP RESSOR
~ N0htkh bbbhs AERATION HYPO.
COL,-
CLARIFIER E
CONTACT TANK MUNITOR
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DISCHARGE -
(3)
TANK Ak Ak 4k Ak Non-Raddadive b A sys w i
I AIR FROTH SLUDGE HYPO.
De5cks.cg g BLOWER SPRAY DIGESTOR < -
TANK &
PUMP (3)
PUMP (2) y
> TREATED SEWAGE SLUDGE DISPOSAL Block Flow Diagram (Interface Requirements) g-lI C
Figure 9.2-9 Potable and Sanitary Water System
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