ML15244A282

Forwards Questionnaire Re Erosion/Corrosion in Feedwater Pipes.Completed Questionnaire Requested within 60 Days

ML15244A282
Person / Time
Site:	Oconee
Issue date:	07/17/1987
From:	Pastis H Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
NUDOCS 8707240341
Download: ML15244A282 (8)

Text

Docket Nos.:

50-269, 50-270 and 50-287 Mr. H. B. Tucker, Vice President JUL Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242

Reference:

Oconee Nuclear Station Units 1, 2, and 3 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/corrosion experience, piping design, feedwater and condensate chemistry and piping materials.

To ensure that both the NRC and the nuclear industry have available a com prehensive 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 me.

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, 8707240341 870717

Seely, PDR.. ADOCK 05000269 Helen N. Pastis, Project Manager PDR Project Directorate 11-3 Division of Reactor Projects I/II

Enclosure:

Erosion/Corrosion Questionnaire cc:

See next page DISTRIBUTION:

Docket File NRC PDR Local PDR JPartlow PDII-3 Reading BJYoungblood Reading SVarga/GLainas EJordan MDuncan HPastis 0G t e da ACRS(10)

PDI DRPI/II Pp"3 RPI/II PD

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ENCLOSURE, PWR EROSION-CORROSION QUESTIONNAIRE U

(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

1.

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....

F

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/temperatureo P= * * *P:.....

P:......

P:.

. P:

T:..

. T:

T:.....

T:.....

Condsate Pump Cond. Polishers BF Pump Steam Generators Low load (typical...

% of full load):

P: * * *P:

P:...

P:..

P.:

T:

T.

T:....

Connsate Pump Cond. Polishers BF PumP Steam Generators Please attach copies of the heat balance diagrams for your actual full load and tiical low load.

C. FEEDWATER 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 4'

pH of FW maximu r-..

minimum.

average.

pH of condensate maximum.

minimum average.

DO, ppb maximum.

minimum.

average.

Cat. Cond. uS/cm.

Spec. Cond. uS/cm.

NH,

ppb N2 4

ppb Boron, ppb Air Inleakage, SC1I.

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..................

D.

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.

70/Doc4

-2

r' 0

0 ENCLOSUREA 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

1.

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 comp9nents (specify)......................................

5.

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

6.

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

Full load pressure, psta/temperature, F :

P:.....

P:.....

P:...

P:.....

P:.....

T:....

LDJ T:.....

T:....

T:.....

T:.....

Connate Pump Cond. Polishers 8F Pump Steam Generators Low load (typical..., of full load):

P:

P:......

P:...

P:....

P:.

T:.

.T:

T:..

T:..

Connsate 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.

FEEDWATER 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 maximu 7.

minimum.

average.

pH of condensate maximum.

minimum.

average DO, ppb maximum.

minimum.

average Cat. Cond. uS/cm.

Spec.

Cond. uS/cm.

N ppb N 4, ppb,

iron, 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..............

D.

MATERIALS

1. Feedwater piping -

ist ASTM or other specification numbers..................

2.

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

3. Attach results of chemical analysis by you or pipe vendors,

70/Doc4

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;.....1 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

1.

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..... F JO.

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..... 5 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 (agtual (preferred) or design):

Full load (pressure, psta/temperature, OF)-.

P P *****

P:.

P:.....

P:.....

oT:

T:

T:....

T:....

lT:

Condensate Pump Cond. Polishers OF Pump Steam Generators P

P': * * *P:

P:....

I~t **T:

T:...

T:..

T. :,...

Con nsate Pump Cnd. Polishers 8F Pump Steam Generators Please attach copies of the heat balance diagrams for your actual full load and typical low load.

C.

FEEDWATER AND CONDENSATE CHEMISTRY

1.

Please complete the attached Table.

2.

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

Year of oper.:

1st 1974 197 1978 1980 1982 1983 1985 1986 1987 pH of FW maximu 7-minimum average.

pH of condensate maximum minimum.

average DO, ppb maximum.

minimum average.

Cat. Cond.

uS/cm.

Spec. Cond. uS/cm.

N4 ppb Boron, 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 8; added at..................

D.

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.

70/Doc4 Mr. H. B. Tucker Oconee Nuclear Station Duke Power Company Units Nos. 1, 2 and 3 cc:

Mr. A. V. Carr, Esq.

Mr. Paul Guill Duke Power Company Duke Power Company P. 0. Box 33189 Post Office Box 33189 422 South Church Street 422 South Church Street Charlotte, North Carolina 28242 Charlotte, North Carolina 28242 J. Michael McGarry, III, Esq.

Bishop, Liberman, Cook, Purcell & Reynolds 1200 Seventeenth Street, N.W.

Washington, D.C. 20036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Senior Resident Inspector U.S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, South Carolina 29678 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones Street Raleigh, North Carolina 27603 Honorable James M. Phinney County Supervisor of Oconee County Walhalla, South Carolina 29621