ML20236C763
| ML20236C763 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 06/21/1987 |
| From: | Wagner D Office of Nuclear Reactor Regulation |
| To: | Fay C WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| NUDOCS 8707300182 | |
| Download: ML20236C763 (4) | |
Text
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j g 2 1 ISBI Docket No. 50-266 Distribution:
and 50-301 N Docket Files DWigginton Mr. C. W. Fay, Vice President NRC PDR" "
GHolahan Nuclear Power Department Local PDR PKreutzer Wisconsin Electric Power Company PDIII-3 r/f DWagner 231 W. Michigan Street, Room 308 PDIII-3 s/f OGC-Bethsda Milwaukee, Wisconsin 53201 EJordan JPartlow ACRS(10)
Dear Mr. Fay:
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 /
'i Central to an understand-corrosion in feedwater pipes in nuclear power plants.
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 com)rehen-sive collection of data regarding erosion / corrosion in feedwater pipes, t1e NRC will assemble a summary of utility information related to ongoing water chemistry I
actions in pressurized water reactors. To enable us 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, j
This request is covered by Office of Management and Budget clearance Number 3150-0011 which expires December 31, 1989. Coments 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, k &
B7062r P
050002 6 David H. Wagner, Project Manager PD Project Directorate III-3 l
Division of Reactor Projects
Enclosure:
PWR Erosion-Corrosion Questionnaire cc: See next page Office:
LA/RDjII-3 PM/PDIII-PD/PDIII-3 Surname: PKrdbler
.DWagner/tg DWigginton Date:
07/g/87 07/p /87 07Q/87 i
o 4
Mr. C. W. Fay Point Beach Nuclear Plant Wisconsin Electric Power Company Units 1 and 2 l
l CC:
Mr. Bruce Churchill, Esq.
Shaw, Pittman, Potts and Trowbridge j
2300 N Street, N.W.
Washington, DC 20037 Mr. James J. Zach, Manager Point Beach Nuclear Plant Wisconsin Electric Power Company 6610 Nuclear Road Two Rivers, Wisconsin 54241 I
Town Chairman Town of Two Creeks j
l-Route 3 Two Rivers, Wisconsin 54241 Chairman Public Service Commission of Wisconsin Hills Farms State Office Building i
Madison, Wisconsin 53702 Regional Administrator, Region III U.S. Nuclear Regulatory Commission P
Office of Executive Director for Operations 799 Roosevelt Road l
Glen Ellyn, Illinois 60137 Resident Inspector's Office U.S. Nuclear Regulatory Commission 6612 Nuclear Road Two Rivers, Wisconsin 54241 1
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PWREROSION-CORROSIONQbESTIONNAIRE (Check or Circle All Applicable) i i
utility Company:
Unit Name:
MWe filled by:
Date:
Phone No.
In service: 19....
Water Treatment: AVT with ammonia, morpholine, hydrazine.
I i
Condensate polishers:
none, cation, powdex, mixed bed;.....% of feedwater flow; i
installed 19....; operated in: H-OH. NH4-OH form.
I Cooling water: fresh, salt. brackish, cooling tower.
l Copper alloy condenser tubing: yes, no. Copper alloy FW heater tubes: LP, HP, none.
I Boric acid used since: 19...; during: operation, layup, low load soaks, other.......
A.
EROSION-CORROSION EXPERIENCE 4
i 1.
Erosion-Corrosion identified in wet steam piping yes no.
2.
Erosion-Corrosion of MSR Chevrons or mesh: yes, no.
Chevron materials stainless steel. carbon steel, other.....................
1 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)..................
l S.
Erosion-Corros.fon of J-Tubes: yes. no.
6.
Erosion-Corrosion of feedwater distribution ring: yes, no.
7.
Erosion-Corrosion of turbine:
L 8.
Erosion-Corrosion of other cycle components (identify)...................... 6*
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% toad........ second pump On at.....% load.
3.
Maximum flow velocity when only 1 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 pressurey and temperatures (agtual (preferred) or design):
Full load (pressure, psia / temperature, f):
P:
P:
P:
P:
P:
{'
"T:
T:
T:
T:
T:
gf 3
. {y 1r 1r Con ensate Pump Cond. Polishers Bf Punp Steam Generators low load (typical
...% of full load):
P:
P:
P:
P:
P:
T:
T:
T:
T:
T:
k U
P g
7 P
tr g
7 Con Mnsate Pump Cond. Polishers Bf Pump Steam Generators Please attach cooles of the heat balance diaorams for your actual full load and typical low loed.
W C.
FEE 0 WATER ANQ CONDENSATE CHEMISTRY l.
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.
mlnlmum.
average.
pH of condensate maximum.
mlnImum.
average.
DO, ppb maximum.
mlnfmum.
average.
s Cat. Cond. US/cm."
Spec. Cond. uS/cm.
NH. ppb N,3 H.
ppb 4
Eron, ppb Air Inleakage.
SCFM Please send any water chemistry summary reports and data.
3.
Chemical additions e
3.1 Ammonias typica l concentrat ion in feedwater '.... ppb; added at...........
3.2 Hydrazine typical concentration in feedwater.... ppbi added at.........
3.3 Boric acids typical concentration in feedwater.... ppb as 8; odded at D.
MATERIALS 1.
Feedwater piping - list ASTN or other specification numbers....................
2.
Wet steam piping:
3.
Attach results of chemical analysis by you or pipe vendors.
70/ Doc 4
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