ML20044B281

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Forwards Responses to Resolve Safety Evaluation Issues,Per D Scaletti 900501 Request.Issues Cover Method of Attachment of Level Instruments That Facilitate Automatic Switch Over of Pumps from Condensate Storage Tank to Suppression Pool
ML20044B281
Person / Time
Site: 05000605
Issue date: 07/13/1990
From: Marriott P
GENERAL ELECTRIC CO.
To: Chris Miller
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
References
EEN-9041, MFN-087-90, MFN-87-90, NUDOCS 9007180280
Download: ML20044B281 (6)
v • d • e


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GE Nuclear Energy

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I?5 catw Avve, San Juse Ct W?S MFN No.087 90 Docket No. STN 50-605 EEN 9041 Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 -

Attention:

Charles L Miller, Director i

Standardization and Non Power Reactor Project Directorate

Subject:

Submittal of Responses to Resolve Safety Evaluation Issues as Requested in NRC Letter from Dino C. Scaletti, May 1,1990.

Reference:

1.. P.W. Marriott to Charles L Miller, same subject, MFN No.' 061-90 May 31,1990.

2.

P.W. Marriott to Charles L. Miller, same subject, MFN No. 088 90, July 16,1990.

! Enclosed are thirty four (34) copies of GE responses to resolve two additional subject safety evaluation issues for the Advanced Boiling Water Reactor (ABWR), Reference. I provided the majority of the responses. The specific issues covered by this transmittal are:

(1) The method of attachment of the level instruments that facilitate the automatic switch -

over of the HPCF and RCIC pumps from the CST to the suppression pool. (PDSER Section 9.2.9).

3 (2) Final sizing of the RCW heat exchangers, (PDSER Section 9.2.11).

OE believes that the modifications to the ABWR SSAR provided in the attachment will resolve

' these issues. It is intended that GE will amend the SSAR with these responses in a future amendment.

Resolution of the final issue pertaining to the remaining portions of the MUWP system that are.

j within the scope of the SSAR will be provided by Reference 2.

L Sincerely,,

l

- P.- W. Marriott,- Manager Re ulatory and Analysis Services M

382, (408) 925-6948 F. A. Ross (DOE) l cc:

D. C. Scaletti (NRC)

D. R. Wilkins (GE) nk J. F. Quirk (GE)

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L 9007180280 900713 PDR ADOCK 05000605

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P 9.2 WATER SYSTEMS 9.2.9 Makeup Water system (Condensate) 1 9.2.1 Station Service Water System 9.2.9.1 Dwign nues The functions normally performed by the (1) The makeup water condensate system (MUWC) station service water system are performed by the shall provide condensate quality water for systems discussed in Subsection 9.2.11.

both normal and emergency operations when i

9.2.2 Closed CoolingWater $ystem (2) The MUWC system shall provide a required l

The functions normally performed by the closed water quality as follows:

1 cooling water system are performed by the systems

. S/cm) 10.5 at 25'C discussed in Subsections 9.2,11, 9.2.12, 9.2.13, Conducth h

and 9.2.14.

Chlorides,3 c. (ppm) s 0.02 l

pH 5.9 to 8.3 at 25'C 9.2.3 DemineralizedWaterMakeup Conducthity and pH limits shall be applied System-after correction for dissolved CO. (The 2

above limits shall be met at least 90% of The functions normally performed by the demin.

the time..)

eralized water makeup system are performed by the systems discussed in Subsections 9.2.8, 9.2.9 and (3) The MUWC system shall supply water for the 9.2.10.

uses shown in Table 9.21.

9.2.4 Potable and SanitaryWater (4) The MUWC system is not safety related.

Systems (5) The condensate storage tank shall have a l

Out of ABWR Standard Plant Scope, capacity of 2,110 m3. This capacity was determined by the capacity required by the 9.2.5 Ultimate Heat Sink uses shown in Table 9.2 2.

Out of ABWR Standard Plant scope. See (6) All tanks, piping and other et nipmt at shall Subsection 9.2.17.1 for interface requirements.

be made of corrosion resistant materials, 9.2.6 Condensate Storage Facilities (7) The HPCF and RCIC instrumentation,which and Distribution System initiates the automatic switchover of HPCF and RCIC suction from the CST header to the The functions of the storing and distribution suppression pool, shall be designed to.

of condensate are described in Subsection 9.2.9.

safety grade requirements (including Installation with necessary seismic 9.2.7 Plant Chilled Water Systems support).

%p The functions of the plant chilled water 9.2.9.2 System Description system are performed by the systems described in Subsections 9.2.12 and 9.2.13, The MUWC P&ID is shown in Figure 9.2 4 This j

system includes the following:

7 9.2.8 Makeup Water System (Preparation)

(1) A condensate storage tank (CST) is provid.

- Out of ABWR Standard Plant scope. See ed. It is of concrete construction with a Subsection 9.2.17.2 for interface requirements.

stainless steellining. The volume is shown in Table 9.2 3.

(2) The following pumps take suction from the CST:

Amendment 11 9.21 0

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mogn cm i...

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.e bA The instrumen?ation~is mounted in'a safety grade Ytandpipe located in the reactor building secondary containment.

With no condensate flowing, the water level.is the same in both tho' CST and-the standpipe - A suitable.

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correction will be made for the effect of flow upon water

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1evel in'the. standpipe,.

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JABWR Standard Plant av a

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(3) ability to prevent or mitigate the conse.

quences of events which could result in (6)' The system shall be designed to prevent any

' potential offsite exposures.

radioactive contamination of the purified water.

The MUWP system is not safety related.

However, the systems incorporate features that 9.2.10.2 System Description assure reliable operation over the full range of normal plant operations.

Si The MUWP system P&lO is show in Figure 9.2 5.

l This system includes the following:

9.2.10.4 Tests and inspections

'(1); A purified water storage tank shall be The makeup water purified distribution syster.

provided outdoors with adequate freeze is proved operable by its use during normal.

protection and adequate diking and other plant operation. Portions of the system means to control spill and leakage.

normally closed to flow can be tested to ensure operability and integrity of the system.

(2) Two MUWP forwarding pumps shall take suction -

from the purified water storage tanks. They The air. operated isolation valves are capable shall have a capacity of 308 gpm and a of being tested to assure their operating discharge head of 114 psi.

Integrity by manual actuation of a switch 5

located in the control room and by observation

_(3) Distribution piping, valves, instruments and of associated position indication lights, controls shall be provided.

Flow to the various systems is balanced by l:

(.1) Any outdoor piping shall be protected from means of manual valves at the individual takeoff freezing.

points.

(5) All surfaces coming in contact with the 9.2.11 Reactor Building CoolingWater purified water shall be made of corro.

System sion resistant materials.

L 9.2.11.1 Design Bases (6) All pumps shall be located at an elevation such that adequate suction head is present-9.2.11.1.1 Safety Design Bases i

at all levels in the purified water storage tanks.

(1) The reactor building cooling water (RCW) system shall be designed to remove heat from E

-(7) Instruments shall be provided to indicate plant auxiliaries which are required for a l

purified water storage tank level in the safe reactor shutdown, as well as those main control room, auxiliaries whose operation is desired i

following a LOCA, but not essential to safe h l

9.2.103 Safety Evaluation shutdown.

Operation of the MJWP system is not required (2) The RCW system shall be designed to perform to assure any of the following conditions:

its required cooling functions following a LOCA, assuming a single active or passive

- (1) integrity of the reactor coolant pressure failure.

boundary; (3) The safety related portions and valves (2) capability to shut'down the reactor and isolating the nonsafety related portions of maintain it in a safe shutdown condition; or Amendment 6 9.23

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  • '.4 L','. Standard Plant REV D t

. TABLE 9.2 4d fy

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DESIGN CHARACTERISTICS FOR REACTOR l

BUILDING COOLING WATER SYSTEM COMPONENTS RCW Pumps RCW (A)/(B)

RCW (C) 4840 4

Discharge Flow Rate -

5,720 gpm/ pump A,da&gpm/ pump.

Pump Total Head 82 psig 75 psig i

Design Pressure 200 psig

- 200 psig r:esign Temperature 1580F 1580F RCW Heat Exchangers RCW (A)/(B)

.RQVR 6

Capacity J0x10 BTU /h J6ka6B*iU/h 68 63 RCW Surge Tanks (w

Capacity -

Equal to 30 days of normalleakage Design Pressure Static Head l

Design Temperature 1580F f

RCW Chemical Addition Tanks L

Design Pressure 200 'psig i-Design Temperature 1580F i

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RCW Piping Design Pressure 200 psig Design Temperature 1580F l>

l l.

Amendment 7 9.219a J~

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