ML13330B235

Forwards Questionnaire Re Erosion/Corrosion in Feedwater Pipes in Nuclear Power Plants to Assist in Preparing Rept Re Actions Being Taken by Utils.Response Requested within 60 Days of Ltr Receipt

ML13330B235
Person / Time
Site:	San Onofre
Issue date:	07/15/1987
From:	Dudley R Office of Nuclear Reactor Regulation
To:	Baskin K, Holcombe J San Diego Gas & Electric Co, Southern California Edison Co
References
NUDOCS 8707270055
Download: ML13330B235 (6)

Text

JUL 15 1987 Docket Nos.: 50-206/361 and 362 Mr. Kenneth P. Baskin Mr. James C. Holcombe Vice President, Nuclear Engineering Vice President -

Power Supply Safety and Licensing Department San Diego Gas & Electric Company Southern California Edison Company 101 Ash Street 2244 Walnut Grove Avenue Post Office Box 1831 Post Office Box 800 San Diego, California 92112 Rosemead, California 91770 Gentlemen:

SUBJECT:

SAN ONOFRE UNITS 1, 2 AND 3 EROSION/CORROSION QUESTIONNAIRE As a result of the Surry pipe erosion/corrosion incident in December of 1986, the NRC is preparing a report that will reference existing research information available and describe the actions being taken by utilities regarding erosion/

corrosion in feedwater pipes in nuclear power plants. Central to an understand ing of erosion/corrosion in pipes is an accurate assessment of erosion/corrison experience, piping design, feedwater and condensate chemistry and piping materials.

To ensure that both the NRC and the nuclear industry have available a comprehensive collection of data regarding erosion/corrosion in feedwater pipes, the NRC will assemble a summary of utility information related to ongoing water chemistry actions in pressurized water reactors. To accomplish this task we ask that you complete the enclosed questionnaire.

The information being requested is quite extensive and will require a diligent effort on your part and ours to assure accurate and timely completion. Also, we realize that parts of the information may already be available to the NRC, but not in a convenient format which is readily accessible. Therefore, we request that you assist us by returning for each unit a single completed copy of the enclosed questionnaire to the Project Manager, U. S. Nuclear Regulatory Commission, Washington, D. C. 20555, within 60 days of receipt of this letter.

We believe the questionnaire is self explanatory; however, if questions arise or clarification is required, please contact your NRC Project Manager.

6707270055 870715 PDR ADOCK 05000206 p

PDR

-2 This request is covered by Office of Management and Budget Clearance Number 3150-0011 which expires December 31, 1989. Comments on burden and duplication may be directed to the Office of Management and Budget, Room 3208, New Executive Office Building, Washington, D. C. 20503.

Sincerely, Richard F. Dudley, roject Manager Project Directorate V Division of Reactor Projects -

III, IV, V and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

PWR Erosion-Corrosion Questionnaire cc:

See next page DISTRIBUTION Docket File NRC & Local PDRS GHolahan JLee RFDudley HRood OGC-Bethesda Edordan JPartlow ACRS (10)

PD5 Plant File DR DV DRSP/PDV DRSP/D:PDV RFDudley:cd HRood GWKni hton 7//,87 7/6187 7/

87 OFFICIAL RECORD COPY

Mr. Kenneth P. Baskin San Onofre Nuclear Generating Southern California Edison Company Station, Unit No. 1 cc Charles R. Kocher, Assistant Mr. Joseph 0. Ward, Chief General Counsel Radiological Health Branch James Beoletto, Esquire State Department of Health Southern California Edison Company Services Post Office Box 800 714 P Street, Office Bldg. 8 Rosemead, California 91770 Sacramento, California 95814 David R. Pigott Mr. Hans Kaspar, Executive Director Orrick, Herrington & Sutcliffe Marine Review Committee, Inc.

600 Montgomery Street 531 Encinitas Boulevard, Suite 105 San Francisco, California 94111 Encinitas, California 92024 Mr. Stephen B. Allman Dennis M. Smith, Chief San Diego Gas & Electric Company Radiological Programs Division P. 0. Box 1831 Governor's Office of Emergency Svcs.

San Diego, California 92112 State of California 2800 Meadowview Road Sacramento, CA 95832 Resident Inspector/San Onofre NPS c/o U.S. NRC P. 0. Box 4329 San Clemente, California 92672 Mayor City of San Clemente San Clemente, California 92672 Chairman Board of Supervisors County of San Diego San Diego, California 92101 Director Energy Facilities Siting Division Energy Resources Conservation &

Development Commission 1516 -

9th Street Sacramento, California 95814 Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane Walnut Creek, California 94596

Mr. Kenneth P. Baskin San Onofre Nuclear Generating Southern California Edison Company Station, Units 2 and 3 cc:

Mr. James C. Holcombe Mr. Hans Kaspar, Executive Director Vice President - Power Supply Marine Review Committee, Inc.

San Diego Gas & Electric Company 531 Encinitas Boulevard, Suite 105 101 Ash Street Encinitas, California 92024 Post Office Box 1831 San Diego, California 92112 Mr. Mark Medford Southern California Edison Company Charles R. Kocher, Esq.

2244 Walnut Grove Avenue James A. Beoletto, Esq.

P. 0. Box 800 Southern California Edison Company Rosemead, California 91770 2244 Walnut Grove Avenue P. 0. Box 800 Mr. Stephen B. Allman Rosemead, California 91770 Manager, Nuclear Department San Diego Gas & Electric Company Orrick, Herrington & Sutcliffe P. 0. Box 1831 ATTN:

David R. Pigott, Esq.

San Diego, California 92112 600 Montgomery Street San Francisco, California 94111 Richard J. Wharton, Esq.

University of San Diego School of Alan R. Watts, Esq.

Law Rourke & Woodruff Environmental Law Clinic 701 S. Parker St. No. 7000 San Diego, California 92110 Orange, California 92668-4702 Charles E. McClung, Jr., Esq.

Attorney at Law Mr. S. McClusky 24012 Calle de la Plaza/Suite 330 Bechtel Power Corporation Laguna Hills, California 92653 P. 0. Box 60860, Terminal Annex Los Angeles, California 90060 Regional Administrator, Region V U.S. Nuclear Regulatory Commission Mr. C. B. Brinkman 1450 Maria Lane/Suite 210 Combustion Engineering, Inc.

Walnut Creek, California 94596 7910 Woodmont Avenue, Suite 1310 Bethesda, Maryland 20814 Resident Inspector, San Onofre NPS c/o U. S. Nuclear Regulatory Commission Mr. Dennis F. Kirsh Post Office Box 4329 U.S. Nuclear Regulatory Commission San Clemente, California 92672 Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. Dennis M. Smith, Chief Radiological Programs Division Governor's Office of Emergency Services 2800 Meadowview Road Sacramento, California 95832

ENCLOSURE PWR EROSION-CORROSION QUESTIONNAIRE (Check or Circle All Applicable)

Utility Company:

Unit Name:

MWe Filled by:

Date:

Phone No.

In service: 19....

Water Treatment:

AVT with ammonia, morpholine, hydrazine.

Condensate polishers:

none, cation, powdex, mixed bed;.....

% of feedwater flow; installed 19....

operated in

H-OH, NH4-OH form.

Cooling water:

fresh, salt, brackish, cooling tower.

Copper alloy condenser tubing: yes, no. Copper alloy FW heater tubes:

LP, HP, none.

Boric acid used since: 19...

during

operation, layup, low load soaks, other.......

A.

EROSION-CORROSION EXPERIENCE I. Erosion-Corrosion identified in wet steam piping:

yes, no.

2. Erosion-Corrosion of MSR Chevrons or mesh: yes, no.

Chevron material:

stainless steel, carbon steel, other.....................

3. Erosion-Corrosion of feedwater piping:

yes, no. Date found...................

Feedwater piping materials:................................................

4. Erosion-Corrosion of:...... elbows......

Ts......

diffusers.......

reducers, valves,.... orifices,.... other components (specify).................

5. Erosion-Corrosion of J-Tubes:

yes, no.

6. Erosion-Corrosion of feedwater distribution ring: yes, no.

7. Erosion-Corrosion of turbine:

HP, LP; identify components:....................

8. Erosion-Corrosion of other cycle components (identify)........................

9. Feedwater temperature range where erosion-corrosion found:

from....

to..... oF

10.

Inspection frequency for feedwater piping.....

years. Steam lines.....

years.

11.

Inspection methods used:

ultrasonic thickness, radiography, visual, other......

B.

PIPING DESIGN

1.

Maximum feedwater flow velocity............ feet/second.

2.

No. of feed pumps operating at 100% load........ second pump On at..... % load.

3.

Maximum flow velocity when only I pump is operating...............

feet/second.

4.

No. of feedwater piping components:....... elbows.......

Ts.......

diffusers, reducers.......

valves........ orifices,

...... other components (specify).........................................

5.

Maximum flow velocity in wet steam piping............ feet/second.

6.

Feedwater pressures and temperatures (actual (preferred) or design):

Full load (pressure, psia/temperature, 0 F.

P= * * *P:.....

P:.....

P:.....

P:.....

T :.

T :.....

T :....

T :.....

T :.....

Con ensate Pump Cond. Polishers BF Pump Steam Generators Low load (typical... % of full load):

P:.....

P:.....

P:....

P:.....

P:

T:.....

T:

T:....

T:.....

Con nsate Pump Cond. Polishers BF Pump Steam Generators Please attach copies of the heat balance diagrams for your actual full load and typical low load.

C.

FEEOWATER -AND CONDENSATE CHEMISTRY

1. Please complete the attached Table.

2.

Feedwater chemistry history (average or typical values, final feedwater):

Year of oper.:

1st 1974 1976 1978 1980 1982 1983 1985 1986 1987 pH of FW maximum minimum average pH of condensate maximum minimum average DO, ppb maximum minimum average Cat. Cond. uS/cm Spec. Cond. uS/cm.

NH, ppb N

n4'

'ppb._

Bgron, ppb Air Inleakage, SCFM Please send any water chemistry summary reports and data.

3.

Chemical additions

3.1 Ammonia

typical concentration in feedwater ppb; added at...........

3.2 Hydrazine

typical concentration in feedwater....

ppb; added at.........

3.3 Boric acid:

typical concentration in feedwater....

ppb as B; added at..................

0.

MATERIALS

1.

Feedwater piping -

list ASTM or other specification numbers...................

2.

Wet steam piping:.........................

3.

Attach results of chemical analysis by you or pipe vendors.

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