ML18093A235

Requests Completion of Encl Questionnaire to Assist in Collection of Data for NRC Rept Re Actions Taken by Utils to Correct Erosion/Corrosion in Feedwater Pipes.Rept Initiated as Result of Dec 1986 Surry Pipe Erosion/Corrosion Incident

ML18093A235
Person / Time
Site:	Salem
Issue date:	07/14/1987
From:	Fischer D Office of Nuclear Reactor Regulation
To:	Corbin McNeil Public Service Enterprise Group
References
NUDOCS 8707200502
Download: ML18093A235 (8)

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Docket Nos.:

50-272/311 Mr. Corbin A. McNeill, Jr.

Senior Vice President - Nuclear Public Service Electric and Gas Company Post Office Box 236 Hancocks Bridge, New Jersey 08038

SUBJECT:

PWR EROSION - CORROSION STUDY RE:

Salem Nuclear Generating Station, Units No. 1 and 2 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 infonnation 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 comprehensive collection of data regarding erosion/corrosion in feedwater pipes, the NRC will assemble a surrmary 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 infonnation 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 infonnation 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 D. C. Fischer, U. S. Nuclear Regulatory Corrunission 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.

Enclosure:

PWR Erosion-Corrosion Questionnaire cc w/enclosure:

See next page DISTRIBUTION

.*Docket. Fi 1 e.*

NRC PDR Local PDR PDI-2 Reading SVarga/BBoger OGC-Bethesda EJordan JPartlow DFi scher/MThadani MO' Brien ACRS {10)

PDI-2/D ' (l,,

WButler (/

07 l\\\\.\\"187 Sincerely,

. /s/

Donald C. Fischer, Project Manager Project Directorate PDI-2 Division of Reactor Projects I/II This request is covered by Office of Management and Budget Clearance Number 3150-0011 which expires December 31. 1989.

Corrnnents on burden and duplication may be directed to the Office of Manag~ment and Budget, Room 3208, New Executive Office Building, Washington, D. C.

20503.

Enclosure:

PWR Erosion-Corrosion Questionnaire cc w/enclosure:

See next-page Sincerely, fJ~c+~~

Donald C. Fischer, Project Manager Project Di recto rate PDI-2 Division of Reactor Projects I/II

Mr. C. A. McNeill Public Service Electric & Gas Company cc:

S. E. Miltenberger Vice President - Nuclear Operations Nuclear Department P. O. Box 236 Hancocks Bridge, NJ 08038 Mark J. Wetterhahn, Esquire Conner and Wetterhahn Suite 1050 1747 Pennsylvania Avenue, NW Washington, DC 20006 Richard Fryling, Jr., Esquire Law Department - Tower SE 80 Park Place Newark, NJ 07101 Gene Fisher, Bureau Chief Bureau of Radiation Protection 380 Scotch Road Trenton, NJ 08628 Mr. Jcihn M. Zupko, Jr.

General Manager - Salem Operations*

Salem Generating Station Post Office Box E Hancocks Bridge, NJ 08038 Robert Traae, Mayor Lower Alloways Creek Township Municipal Hall Hancocks Bridge, NJ 08038 Thomas Kenny, Resident Inspector Salem Nuclear Generating Station U.S. Nuclear Regulatory Commission Drawer I Hancocks Bridge, NJ 08038 Richard F. Engel Deputy Attorney General Department of Law and Public Safety CN-112 State House Annex Trenton, NJ 08625

• ---*---------------*---- -* ---*-~-*~* -~--------*------------*--*

Salem Nuclear Generating Station Frank Casolito, Action Chief Bureau of Radiation Protection Department of Environmental Protection 380 Scotch Road Trenton, NJ 08628 Richard B. McGlynn, Commission Department of Public Utilities State of N!!w llersey 101 Commerce Street Newark, NJ 07102 Regional Administrator, Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 Lower Alloways Creek Township c/o Mary 0. Henderson, Clerk Municipal Building, P.O. Box 157 Hancocks Bridge, NJ 08038 Mr. Bruce A. Preston, Manager Licensing and Regulation Nuclear Department P. O. Box 236 Hancocks Bridge, NY 08038 Mr. David Wersan Assistant Consumer Advocate.

Office of Consumer Advocate 1425 Strawberry Square Harrisburg, PA 17120 Morgan J. Morris, III General Manager - Operating License Atlantic Electric P. 0. Box 1500 1199 Black Horse Pike Pleasantville, NJ 08232 Delmarva Power c/o 'Thomas S. Shaw, Jr.

Vice President - Production 800 King Street P. O. Box 231 Wilmington, DE 19899

PWR EROSION-CORROSION QUESTlONNAIRf (Check or Circle All Applicable)

Uti I ity Company: ____________ _ Unit Name: ______ _

ENCLOSURE HWe filled by: _______________ _

Date: ------

Phone No. ______ _

In service: 19 ****

Water Treatment:

AVT with amnonia, morpholine, hydrazine.

Condensate polishers:

installed 19 **** ;

Cooling water:

fresh, Copper alloy condenser Boric acid used since:

none, cation, powdex, mixed bed;..... i of feedwater flow; operated in: H-OH, NH4-0H form.

salt, brackish, cooling tower.

tubing:

yes, no. Copper alloy FW heater tubes:

~P. HP, none.

19 *** ;during: operation, layup, low load soaks, other..... ~.

A.

EROSION-CORROSION EXPERIENCE I.

Erosfon-Corrosion identified in wet steam p1p1ng:

yes, no.

2.

Erosion-Corrosion of HSR Chevrons or mesh:

yes, no.

Chevron material: stainless steel, carbon steel, other.' *.**.***..*.** < *****

3.

Erosion-Corrosion of feedwater piping:

yes, no.

Date found ***.****.*.**.* ~ ***

f eedwater p Ip i ng material s: *..*...........*...******.*********.**.....*.***.

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.

II.

Inspection methods used:

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

B.

PIPING DESIGN

l.

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

2.

No. of feed pumps operating at 1ooi load....*.., second pump On at **..* i 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~

P:

P:

P:

P:

T:

T: * *...

T:

T:

Con ensate Pump Steam Generators Low load

• .* 1,offull load):

P:

P:

Con Steam Generators Please attach copies of the heat balance diagrams for your actual full load and typical low load. \\.

~

• ~.....

C.

FEEOWATER A~Q CONDENSATE CHEMISTRY

1.

Please complete the attached Table.

2.

feedwater chemistry history (average or typical values. final feedwater):

Year of oper.:

pH of FW maximum minimum average pH of condensate maximum. ____________________________ _

minimum. ____________________________ _

average

• _____________________________ _

DO, ppb maximum. ______________________________ _

minimum

• _____________________________ _

average. ___________________________ _

Cat. Ccnd. uS/cm

• ________________________________ _

Spec. Cond. uS/cm *--*--- ________________________ _

NH3

• ppb

~2R4* ppb BOron, ppb Air lnleakage, SCFH Please send any water chemistry surrmary reports and data.

3.

Chemical additions

3.1 Anmonia

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 ******.*.*........

O.

MATERIALS

1.

Feedwater piping - list ASTH or other specification numbers **...**.......*..*..

2.

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

3.

Attach results of chemical analysis by you or pipe vendors.

70/Doc4 PWR EROSION-CORROSION QUESTIONNAIRE (Check or Circle All Applicable)

Utility Company=-----------~ Unit Name: ______ _

ENCLOSURE HWe ------

Filled by: _______________ _

Date: ____ _

Phone No. ______ _

In service: 19 ****

Water Treatment:

AVT with armionia, morpholine, hydrazine.

Condensate polishers:

i nsta 1 1 ed 19 **** ;

Cooling water: fresh, Copper alloy condenser Boric acid used since:

none, cation, powdex, mixed bed;.. ~.. i of feedwater flow; operated in: H-OH, NH4-0H form.

salt, brackish, cooling tower.

tubing:

yes, no. Copper al Joy FW heater tubes:

LP, HP, none.

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 rnateria1s:....................***.....**.......**.......**.

4.

Erosion-Corrosion of: ***** elbows, Ts,..**. diffusers,... ~ ** ; reducers,

• * *

• va 1 ves,.... 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:

froin **** to **.** 0 f

10.

Inspection frequency for feedwa~er piping ***** years.

Steam lines ***** years.

11.

Inspection methods used: ultrasonic thickness, radiography, visual, other ****.*

8.

PIPING DESIGN

1.

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

2.

No. of *feed pumps operating at 1ooi load....*.*, second pump On at **.** i 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}:

ful 1 load (pressure, psis/temperature, 0.f.l...!.

P:

P:

P:

P:

P:

T:.....

T:

T:

Con ensate Pump Steam Generators Low load

... i of ful 1 load):

P:

P:

P:

P:

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

\\

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lo' I*

C.

FEEDWATER AND CONDENSATE CHEMISTRY

1.

'Please complete the attached Table.

2.

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

Year of oper.:

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 N2~4' ppb BOron, ppb Air Inleaka_ge, SCFH Please send any water chemistry sunmary reports and data.

3.

Chemical additions

3. 1 Arrrnon i a:

typical concentration in f eedwater *.. *

• 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 *****.*...*.**...*

O.

MATERIALS J.

Feedwater piping - list ASTH or other specification numbers **..*.*.*****....*.*

2.

Wet steam piping:.......... *-*..............

3.

Attach results of chemical analysis by you or pipe vendors.

70/0oc4