ML20236D455
| ML20236D455 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 07/21/1987 |
| From: | Mcneil S Office of Nuclear Reactor Regulation |
| To: | Tiernan J BALTIMORE GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8707300455 | |
| Download: ML20236D455 (4) | |
Text
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4 July 21~-1937; t"
Docket Nos. 50-317.
'DISTRIBUITON~
7
'and'50-318
- %IEEM"TTTF71 B.;Boger NRCPDRL S. Varga Local'PDR-E. Jordan
- Mr. J.:A.'Tiernan PDI-1 Rdg.
J. Partlow lVice President-Nuclear' Energy.
C. Vogan ACRS(10).
Baltimore Gas and Electric Company
.S. McNeil L. Tripp.
P.~0. Box-1475~
. Baltimore,. Maryland 21203
.De r Mr. Tiernan:
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 understanding '
'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 summary of utility. information related to ongoing water chemistry actions in pressurized water reactors. To accomplish this task we ask that you completej 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.J Also,
~
.we realize that parts 'of the information may already be available to the: NRC, but not in~a convenient format which is readily accessiblei Therefore, we request that'.you assist.us by-returning a single. completed copy'of the enclosed questionnaire to'the Document Control' Desk, U.S. Nuclear. Regulatory Commission, Washington, DC, 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.
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, DC '?0503.
Sincerely, Scott Alexander McNeil, Project Manager Project Directorate I-1 Division of Reactor Projects, I/II
Enclosure:
j
'PWR Erosion-Corrosion Questionnaire l
cc: See next page I
PDI-l' PDI-1 l
CVogan SMcNeilJoa,
'7/ /87 7/g /87' b
7 p
.Ps
AJ-
-Mr. J. A. Tiernan a
-Baltimore Gas & Electric Company Calvert Cliffs Nuclear Power Plant l
Cc:
Mr. John M. Gott, President Regional Administrator, Region J i
Calvert County Board of U.S. Nuclear Regulatory Commission
-Commissioners Office of Executive Director Prince Frederick, Maryl' nd 20768 for Operations a
631 Park Avenue D. A. Brune, Esq.
King of Prussia, Pennsylvania ~194C6 General Counsel Baltimore Gas and Electric Company P. O. Box 1475
)
Baltimore, Maryland 21203 Jay E. Silberg, Esq.
Shaw, Pittman, Potts and Trowbridge 1800 M Street, NW 1
Washington, DC 20036 Mr. M. E. Bowman, General Supervisor Technical Services Engineering Calvert Cliffs Nuclear Power Plant
'MD Rts 2 & 4, P. O. Box 1535 i
Lusby, Maryland 20657-0073 l
Resident Inspector c/o U.S. Nuclear Regulatory Commission P. O. Box 437 Lusby, Maryland 20657-0073 Bechtel Power Corporation 1
ATTN: Mr. D. E. Stewart Calvert Cliffs Project Engineer 15740 Shady Grove Road Gaithersburg, Maryland 20760 Combustion Engineering, Inc.
ATTN: Mr. W. R. Horlacher, III i
Project Manager P. O. Box 500 1000 Prospect Hill Road Windsor, Connecticut 06095-0500 l
Department of Natural Resources Energy Administration, Power Plant Siting Program ATTN: Mr. T. Magette Tawes State Office Building Annapolis, Maryland 21204 l
l i
1 4
e PWR EROSlON-CORROSION QUESTIONNAIRE 1
9 (Check or Circle All Applicable)
Utility Company:
Unit Names NWe filled by:
Date:
Phone No.
y in service: 19
.f..
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:
Boric acid used since: 19...; during: operation, layup, low load soaks, other.......
A.
EROSION-CORROSION EXPERIENCE i
1.
Erosion-Corrosion identified in wet steam piping: yes, no.
2.
Erosion-Corrosion of MSR Chevrons or mesh:
yes, no.
Chevron materials sta!nless steel, carbon steel, other.....................
3.
Erosion-Corrosion of feedwater piping:
yes, no.
Date found...................
Feedwater piping materials:
4.
Eroston-Corrosion of:..... elbows...... Ts,..... diffusers,......: reducers,
.... va l ves,.... or i f ices,.... other components (spec i fy)..................
S.
Erosion-Corrosion of J-Tubes: yes, no.
6.
Erosion-Corrosion of feedwater distribution ring: yes, no.
7.
Erosion-Corrosion of turbine:
8.
Erosion-Corrosion of other cycle components (identify)...................... 6*
9.
Feedwater temperature range where erosion-corrosion found:
from.... to..... f 10.
Inspection frequency fcr feedwater piping..... years. Steam lines..... years.
11.
Inspection methods used: ultrasonic thickness, radiography, visual, other......
i B.
PIPING DESIGN 1.
Maximum feedwater flow' velocity............ feet /second.
2.
No. of feed pumps operating at 1007. Ioad........ 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 v7t steam piping............ feet /second.
6.
Feedwater pressures and tt.mperatures (agtual (preferred) or design):
load (pressure, psla/ temperature, f):
l Full P:
P:
P:
P:
P:
k
^
T:
T:
T:
T:
T:
i p
U 4
g yi m
u y4 v
Condensate Pump Cond. Polishers BF Pump Steam Generators i
Low load (typical
...% of full load):
P P:
P:
P:
P T:
T T:
T:
T:
i P
V 4
b j
Q y
Con nsate Pump Cond. Polishers BF Pump Steam Generators j
Please attach cooles of the heat balance diaorams for your actual full load and typical low load.
)
-l-
,__7_-__--------.
C.
FEEDWATER AND CONDENSATE CHENISTRY f
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 e
pH of FW mLximum.-r-3 minimum.
average.
pH of condensate maximum.
minimum.
average.
D0. ppb maximum.
minimum.
average.
Cat. Cond, uS/cm.
Spec. Cond, uS/cm.
NH. ppb 3
NM4, ppb ron, 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 - list ASTM or other specification numbers....................
t 2.
Wet steam piping:...'.......................
3.
Attech result's of chemical analysis by you or pipe vendors.
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