ML17298B637

Forwards Draft Proposed FSAR Changes That Revise Nuclear Sampling Sys Flow Rates During Sample Purging & Revise Sys Pressure.Changes Expected to Be Incorporated in Amend 14 to FSAR Which Will Be Submitted in Feb 1985

ML17298B637
Person / Time
Site:	Palo Verde
Issue date:	12/10/1984
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Knighton G Office of Nuclear Reactor Regulation
References
ANPP-31391-EEVB, NUDOCS 8412130381
Download: ML17298B637 (15)

Text

REGULATORY NFORMATION DISTRIBUTION SY EM (RIDS)

ACCESSION NBR:8412130381 DOC ~ DATE: 84/12/10 NOTARIZED:

YES FACIL:STN-50-528 Palo Verde Nuclear Stationi Unit 1~ Arizona Publi STN-50-529 Palo Verde Nuclear Station~

Unit 2i Arizona Publi STN-50-530 Palo Verde Nuclear Stations Unit 3~ Arizona Publi AUTH,NAME AUTHOR AFFILIATION VAN BRUNTrE ~ E.

Arizona Public Service Co, RECIP ~ NAME RECIPIENT AFFILIATION KNIGHTONg G ~N ~

Licensing Branch 3

SUBJECT:

Forwards draft proposed FSAR changes that revise nuclear sampling sys flow rates during sample purging 8, revise sys pressure, Changes expected to be incorporated in Amend 14 to FSAR which will be submitted in Feb 1985

'OCKET 05000528 05000529 05000530 DISTRIBUTION CODE:

B001D COPIES RECEI VED: LTR TITLE: Licensing Submittal:

.PSAR/FSAR Amdts L

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Arizona Public Service Company ANPP-31391-EEVB/WFQ December 10, 1984 Director of Nuclear Reactor Regulation Mr. George W. Knighton, Chief Licensing Branch No.

3 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3

Docket Nos.

STN 50-528/529/530 PVNGS FSAR Update Nuclear Sampling System File:

84-056-026 G.1.01.10.

Dear Mr. Knighton:

Enclosed are draft proposed FSAR changes that revise the nuclear sampling system flow rates during sample purging and revise the system pressure for your information.

This change is considered acceptable since turbulent flow (Reynolds number greater than 4000) is maintained.

These changes are expected to be incorporated in FSAR Amendment 14 to the FSAR which is scheduled for submittal in February 1985.

Please contact William Quinn of my staff if you have any questions.

Very truly yours, E.

E.

Van Brunt, Jr.

APS Vice President Nuclear Production ANPP Project Director EEVB/WFQ/mb Enclosure 8412130381 841210.

PDR ADOCK 05000528, PDR Ig

ANPP-31391 STATE OF ARIZONA

)

) ss.

COUNTY OF MARICOPA)

I, Edwin E.

Van Brunt, Jr.,

represent that I am Vice President, Nuclear Production of Arizona Public Service

Company, that the foregoing document has been signed by me on behalf of Arizona Public Service Company with full authority to do so, that I have read such document and know its

contents, and that to the best of my knowledge and belief, the statements made therein are true.

Edwin E.

Van Brunt, Jr.

deere to before me tbie~bday of eo~,

1984.

No ary Publi My,Commission Expires:

'p Coolmluion'Expires April 6, 186l

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Mr. G.

M. Knighton PVUGS FSAR Update Nuclear Sampling system ANPP-31391 Page 2

cc:

A. C. Gehr (w/a)

R. P.

Zimmerman (w/a)

E. A. Licitra (w/a)

0

PViilGS FSAR PROCESS AUXILIARiES cool'. g systems, provisions for extracting, processing, and analyzing samples from the follow-ing points are provided:

each of the two shutdown cooling suction lines, and the safety injection pump min'-flow lines.

2.

Pos"-Accident Boron concentration maybe performed for any liquid sample drawn for post-accident analysis.

~ Readout appears on a monitor in the Hot Lab.

E.

Chemical and Volume Control System (CVCS)

Samples

'Both liquid and gas sampling provisions are required to monitor CVCS performance.

In order to monitor the overall purification effectiveness, liquid samples are taken from the purification filter inlet stream for filter-able corrosion products, the outlet stream for soluble activity, and the purification ion exchanger outlet for soluble activity.

2.

Gas samples are taken from the volume control

tank, gas stripper, equipment drain tank, and reactor drain tank.

These samples are used to verify the oxygen content of these tanks.

Representative Samples n order to obtain representative

samples, the follow-ing minimum flow rates (based on sample lines of 1/2 inch OD piping) are required:

Liquid sample flow rate:

0.6 gal/min Liquid pu ge flow rate:

1.0 gal/min Pu g

rlow rates are higher than the sample flow rates

=.or removing crud from the sampling lines.

February 1984 9.3-15 Amendment 12

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=ROCESS AUXILIARIES

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>'-ov'.-'.=.i. io lzmx'c the sample s=u"e to a value below the design rating o the s a~pl ~ 7'Lg system

~

Th eismic des'gn classification and quality group classification of sample lines and components conform to the classification of the system to which each sampling line and component is connected out to such a point where classification to lower seismic and quality group classification is justified on the basis that adequate isolation valving or flow restric-tion is provided.

So~pie lines penetrating the containment are provided with isolation valves in accordance with 10CFRSO,

ppendiz A, General Design Criterion 55 or 56.

Con ain-ent isolation is described in section 6.2.4..

The configuration of the process sampling system provides the sample points and capability outlined in le 9,3-3.

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~a= process sampling system provides the capability to conduct the continuous analyses indicated in table 9.3-3.

The process sampling system shall provide the capabil-ity o conduct discrete analyses on samples as indi-cated in table 9.3-3.

4$ ~

Reactor coolant sample lines shall be sized to assure complete turbulent flow during purging (i.e., Reynolds

>10 ).

Th's ensu es particle suspension.

NlQlaCw w

~ M 9.3-15A May 1981

PVNGS FSAR PROCESS AUXILIARIES In order to assure that a representative sample is obtained, the sampling lines are purged prior to withdrawing the sample.

The volume of the purge flow must be at least twice sampling line volume.

This purge must be accomplished for two different sections of the sampling system.

First, the lines are purged, usually to the volume control tank to minimize waste or to the equipment drain tank.

Second, the lines to the sample sink are purged prior to withdrawing a hand sample.

The pressure and flow rate of these purge flows are indicated in the sampling room.

The sample volume will vary according to the type of analysis 1

to be performed.

The hot leg and pressurizer steam space samples that will be collected as high pressure, low temperature samples within the sample vessel will have a volume of 1 liter.

From this type of sample, corrosion product concentrations and activity levels, fission products and gases, or other noncon-densable gases can be determined.

However, these same samples can be collected at the sample sink as low pressure, low tem-perature samples.

In this case, the ~ample volume required would be approximately 250 ml for a boron or chloride concen-tration analysis and could be as large as 5 liters for a crud concentration analysis.

When testing for coolant pH and con-ductivity at the various sample points, a sample volume of 250 ml will also be sufficient.

Samples can be collected at the sample sink located in a-hooded, ventilated enclosure equipped with a fan exhausting to the plant vent system.

A demineralized water line is routed to the sink for flushing purposes.

The sink drains 'to the liquid radwaste system.

Relief protection is provided to limit the sample pressure to JfY>psig.

The relief valves discharge tc the equipment drain tank located in the CVCS.

el ~

iso 9.3-31

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