ML20235B044
| ML20235B044 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 09/21/1987 |
| From: | Andrews R OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| LIC-87-629, NUDOCS 8709230512 | |
| Download: ML20235B044 (6) | |
Text
_ _-._
Omaha Public Power District 1623 Harney Omaha. Nebraska 68102 402/536 4000 September 21, 1987 LIC-87-629
)
U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
References:
1.
Docket No. 50-285 2.
Letter from NRC (A. Bournia) to OPPD (R L. Andrews) dated July 15,1987 Gentlemen:
SUBJECT:
PWR Erosion-Corrosion Questionnaire Reference 2 requested that Omaha Public Power District (0 PPD) complete a questionnaire regarding erosion / corrosion in feedwater pipes.
Accordingly, please find attached OPPD's response to this questionnaire.
If you have any additional questions, please do not hesitate to contact us.
Sincerely, f
Ujd) 9 R. L. Andrews Division Manager Nuclear Production RLA/me Attachments cc: LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Ave., N.W.
Washington, DC 20036 R. D. Martin, NRC Regional Administrator A. Bournia, NRC Project Manager P. H. Harrell, NRC Senior Resident Inspector l
l l
0(
8709230512 070921 1
0 PDR ADOCK 05000295 P
PDR 4ssua i rr puum,.r io opponunau
r -- -
- ~ - - - - - - - - - - - ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
i PWR EROSION CORROSION QUESTIONNAIRE UTILITY COMPANY Omehe Ptbtic Power District UNIT NAME Fort Cathoun Station MWe 502 cross FILLED OUT BY: Douates Motter DATE: 9/18/87 PHONE No.
402 426 4011 IN SERVICE: 1973 WATER TREATMENT: AVT with Anrionie. moroholine, hydratine Condensate polishers: Portable orf or to startuo. beoen in 1987 mixed bed: operated inh OH Cooling water: fresh I
Copper alloy condenser tLbing: no Copper alloy FW heater ttbes: LP reeleced in 1987 with S.S.
Boric acid used since: 1986
- during: ooeretion. tow load seeks I
A.
EROSION CORROSION EXPERIENCE 1.
Erosion-Corrosion identified in wet steenpiping: ves 2.
Erosion Corrosion of MSR Chevrons or mesh N/A 3.
Erosion-Corrosion of fee &ater piping: ves Date Found: M8Y 1987 Feedwater piping materials.eplaced: Carbon steel A 105 11. A 106 Grede B. A 234 WPB A 234 WP22 4.
Erosion-Corrosion oft _j,,, Elbows, 7 diffusers, and 7 strofaht sections. 1 end coo 5.
Erosion-Corrosion of J Tibes: N/A 6.
Erosion Corrosion of fee & ster distribution ring no 7.
Erosion Corrosion of turbine HP Identify components: shelt, moderate blade 8.
Erosion Corrosion of other cycle cenponents (identify) moisture seoerator 9.
Feedwater temperature range where erosion-corrosion fomd:
f rom,JS,0_ to 405'F 0
- 10. Inspection f remency for fee & ster piping: every refuelina. Steam lines every refuel (no beginnina in 1987
- 11. Inspection methods usec: ultresonic thickness. visual
(
B.
PIPING DESIGN 1.
Maxinun feedwater flow velocity encrox. 50.7 f t/sec.(throuah a venturi) 2.
No. of feed punps operating at 100% toad 2 second punp on at enerox,10% toad.
3.
Maxinun flow velocity in the fee &ater system when only 1 pulp is operating Aporeximately 25 (throuah a venturi) ft/sec.
4.
No. of feedwater piping conponents:A list of ecolleable isometries is ettsched. Cooles of the isometries are incitried for A. Bournia 5.
Maxinun flow velocity in wet steam piping Acorox. 220 ft/sec.
6.
Feedwater pressures and temperatures (design):
Full load (pressure psla/ temperature. "F):
P:.M P
'P: 175- - P: 1Q09 P.89.
e T:.1QQ F T:
T 400.
T: 4 0, u,,
7:,44}.
8 n
1 1a, 1
t v
Condensate Pum Cond Poiishers BF Pump Steam Generators O
low load (typical
...% of full load):
P:
Pt P:
P:
P:
T:
T T:
T:
T y
'f Q
V
'I g
1 C
y l
ConoTnsate Pum Cond. Polishers BF Pump Steam Generators Please attach cooles of the heat balance diaQrams for your actual full load and typical low load.
The full load heat balance diagram is included as Attachment 1.
Fort Calhoun Station is a base load plant. No low load heat balances are available.
4 C.
FEE 0 WATER AND 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
- 9.70. 9.80 _. 9. 60_.
9_ R1. o 44. 9.68 2222..
pH of FW maximum.
minimum.
7.00 6.20 7.1 1._.
8.04_. 8.07. y 1_. m.
8.93 8.88 _. 8.98. 8.99. 9.03. 8.79.g 93,.
average.
pH of condensate 9.36 9.20 9.6 __. 9.36_. 9.30. 9.71__9.32.
maximum.
mininKn.
8.3 8.4
- 8. 58 _. 8.75. 8. 39. R. R3 _.8L cEL.
8.98 8.96 8.94_. 9.01. 8.93. 0.05.g 18..
average.
- 00. ppo maximum.
5 25 10 80
. 20
. 10
_.5 minimum.
0
.O O_ _. O 5
5
.5
. 0.0
' 2 D ___. 5. 4.. R 0
.74
. 4 14 _.c n average.
See Note #1_.
Cat. Cond. uS/cm.
Spec. Cond. uS/cm.
4.84 4.83_
3.98. 3.67_. 3.56. 4.6 _.5.31.
NH. ppb See Note *?.
336
. 767 42dL_.
50
.30
. 26
. 30
. 31.7. 61_ A 12.2.
N "3 ppo 24 See Note d3.
Boron, ppb Air Inleakage.
8.6 7.1.
SCFM See Note #4 Please send any water chemistry sumnary reports and data.
3.
Chemical additions
~
b; added d h/.d.r,az,ine,,,
typical concentration in feedwater... 0.. ppb; added at ppppgggte
3.1 Amnonia
C typical concentration in feedwater.l.
3.2 Hydrazine
3.3 Boric acid: typical concentration in feedwater t.rAc# ppb as 8 added at f999watgr,i,sql,a,ti.o,n valves 0.
MATERIALS 1.
Feedwater pip ing - l i st ASTM or other spec i ficat ion numbers....................
2.
Wet steam piping: A2.3.4.,.3335,.6}05,SlG5....
A155, A234, A105, A106 3.
Attach results of chemical analysis by you or pipe vendors.
No Chemical Analysis was tynically performed on balance of plant piping.
Through June 1987 Data not available prior to 1978. At the time, records were only required to be retained for a period of five years.
NOTE 1:
Parameter not monitored NOTE 2:
NH, not monitored prior to 1985 NOTE 3:
Boration of the secondary began in January 1986. Boron Concentration is sampled from the steam generator blowdown where it is maintained at 5 to 10 ppm NOTE 4: Air inleakage not monitored orior to May 1986.
i i
70/ Doc 4 l 1
v11y3HW3NI I 7
j.
j c,C rn sse e
i
)
=
l 0,
E 0,05 MV E.?h
.Eh.
E eS e
e
,c r
! ff
$ E [0f NN!hM s.N E
g x.
m,E
- 0 8
e. 0. a.
9 g o,s,..
4.3 ec a}gi.
" 3' a s. h. 5. m.
E}
y s
R E 9
2339 8 s
m
$.).E.*r ! i s*
s 3h epar ej
~
a.
{,-
@f p(:)
, 1 r [d 9
- i r
eeBe4
=
i:
- 1 4$
9 mA'r;]
3
, 2 s'~.
arW..,4,4 F. 8' a, ky R
-o 7
N
$[
lk P '
3 C i"
a 6753 2a a
I l
oo.
.g gg' g
ggsi01 "4 512 n0 9601/.(
yhh P
.75751
- 71422 Q g
H0 3 y m
l 96 3
@ W*
@ E
%4 H9 389 n3 511 n7 5001 g
mf P5 3 a
\\.14199
- 709651 h
H7 5091 wN 2w gO 04E gb 5,
E EIE y
www e,
3N n3,971 ne.9391 M e, 3
wQ H9 3391 N
g5v H8 5 41 P
.41253
'511282 W
g p
9391
%7 E
)%.F M1 3011 P2 35 8754653 5 4 4
002 I
c 8y
- 9 871*a'
-O-02 9 0
$g aC h6 833 i(
N 1
83 541 n5 7101 F4 563 H0 4097 bP.663
%lla y e
.343
+
P1
- 81636 *04geg H6*7181 W
$.E m
s m u sr gug e.
3 k g=.
s m
h E
I gg n4 643 e9?4974 3
.w wh g
A
)(
I g
3@. T F
'7153 a
SOa S
- ee342 agP g M9 5611 g
%. %.y 3 117554
- 122373 P3
=
3
.2
%%y gg e4"
'g 4 *.!*.
gg o
M0 5311 P
P7 982
- 268292 hg ths UE 7
~
[
3 E p5 381
"* 6011 M9 6,6, g.1614g5 4
$u$
li a
011 dw,
.3 ss 0S3 dI73 NnH838 POTS 6 oNVHV dA8130 dogAEM 0881W801 3:6 nae gogA oY1H0nM 01V1loN 3071" d0M38 H3VL 8V7VN33 T0*2-T 83A*T 4/81 ONIA
4.
ATIACEMENT ' 2 I'
CONDENSATE FEEDHATER 35591 IC-46 35557 IC-13 35597 IC-49 35558 IC-14 35598
.IC-50 35560 IC-15 35599 IC-51 35561 IC-16 35600 IC-52 35562 IC-17 35601 IC-53 35559 IC-14A 35602 IC-54 35563 IC 35604 IC-56 35889 IC-342 35605 IC-57 35895 IC-346 35606 IC-58 35614 IC-67 35607 IC-59 35970 IC-426 35608 IC-60 35971 IC-427 35609 IC-62 35953 IC-409 35610 IC-63 8451 W-4107 1
8452 W-4108 8442 W-2126 8447 W-4100 8441 W-2125 HEATER MRAINS 35569 IC-24 35565 IC-20 35571 IC-26 35609 IC-62 35573 IC-28 36012 IC-467 35575 IC-30 36011 IC-466 l
l 35581 IC-36 36005 IC-462 35580 IC-35 36006 10-463 35564 IC-19
c ATTACHME2Tf 2 (centinued)
HEATER VDTTS l
8864 VD-6017 8866 VD-6019 8862 VD-6015 8861 VD-6014 10362 VD-6011 8860 VD-6013 8865 VD-6018 8863 VD-6016 8857 VD-6001 8858 VD-6002 8856 VD-6000 8859 VD-6012 35670 IC-115 35669 IC-ll4 35671 IC-ll6 35672 IC-117 35962 IC-418 35963 IC-419 35960 IC-416 35961 IC-417 35959 IC-415 35964 IC-420 1
i l
1 l
i