ML20236R869
| ML20236R869 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/18/1987 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 5211-87-2212, NUDOCS 8711240075 | |
| Download: ML20236R869 (5) | |
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GPU Nuclear Corporation L
4 Nuc, lear.
- ,oma=
Middletown, Pennsylvania 17057 0191 l
l 717 944 7621 TELEX 84 2386 Writer's Direct Dial Number:
November 18, 1987' 5211-87-2212 U.S. Nuclear. Regulatory Commission Attn: Document Control Desk Washington, DC 20555 i
Gentlemen:
Three Mile Island Nuclear Station, Unit 1 (TMI-1).
Operating License No. DPR-50 Docket No. 50-289 PWR Erosion-Corrosion Questionnaire Attached _is the completed PWR Erosion-Corrosion ~ 0 questionnaire requested in the September 11, 1987 NRC letter from G. E. Edison to H. D. Hukill.
Sincerely,
. D.
I ki Vice President & Director, TMI-l HDH/DVH/spb:1032A cc:. G. Edison R. Conte
' Attachments 8711240075 871118 l
l PDR ADOCK 05000209 P
PDR Ql
'\\\\
. GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation
____________-___a
qg y
ENCLOSURE
.PWR EROSION-CORROSION QUESTIONNAIRE F'
~ Check or Circle Al1 Applicable)
(
b MWe 871 cut i N tyJ Companys.
GPU Nuclear.
Unit Name:
TMI-1 i' '
- D. V. Hassler Date
- 11-2-87 Phone No.(7171 948-8833 lf i l l ed ' by s..
L in services 19'.74.'.
Water-Treatment: CAVTwithammonialmorpholInc.(hydrazine)
~100% condensate flow j
Condensate polishers: none cation.(powded mixed bed: 75.4.1 of feedwater flow:
q y~
4 Installed 19.79. operated in: H-0H.(NH4-OH forsQ
'I sait. brackish._Gooling towoj Cooling waters e
yes.(no) Copper alloy FW heater tubes: LP. HP.
Copper alloy nser tubing:
n
- Soric acid used since
- 19
...I during operation layup, low load soaks.(other).r10.used
. A.
ER0510N-CORR 0510N EXPERIENCE' I.
Erosion-Corrosion identified in wet steam piping:
no.
/
p 2.
Erosion-Corrosion of MSR Chevrons or mesh: yes.
c
. Chevron material s. stainl ess stee l. Cearbon steelk other.....................
~
Erosion-Corrosion or feedw.t., pipi,ng,.,feedwater piping materials:. M 3.
..... elbows...... Ts...... diffusers.......: reducers.
sd.. Erosion-Corrosion oft
.... valves..... orifices..... other components (specify). 7ff..ilfD.S......
+
6.
Erosion-Corrosion of J-Tubes yes. @
6.
Erosion-Corrosion of feedwater distribution ring: yes.@
17.. Erosion-Corrosion of turbine HP. LP: Identify components:
....PPPP............
- 8. - Erosion-Corrosion of other cycle components (identify) o f?.d..h.e,a,tpy,pryjpg,(Uptg,1) f 9.::Feedwater-temperature range where erosion-corrosion founds from.n. to.W.. F
-!!.' Inspection methods used: fultrasonic thicknesp radiography, visual, other......
B.
P! PING'OESIGN
- Maximum feedwater flow velocity...1.7 E.... feet /second.
8..
No. of feed' pumps operating at ' 1001 ' ioed.. 2..... second pump On at 9.-50.5 load.
4
- 2. -
- 3. ' i Maximum. flow velocity when only I pump is operating 14..A..flate. 7... feet /second.
Ed..
- No. ' of feedwater piping components:..lAS.. e l bows....L9.. Ts...o.. d i f fuser s.
. 39.. reducers.. M.. valves....A.
orifices.
....... other components (arec i fy) A.f.lm..vmturj es. A. fR.hsAters. A. PPhrgers (Note 3) 5.
~ Maximum flow velocity in wet st'eam piping.S.e#. Ro.tp. 4.. feet /second.
(preferred) or design):
6.
'Feedwater pressures and temperatures (agtualF): p = psig i
Full t w (oressure. osta/ temperature.
See P:. HU.
P. 1.7.Q P: 58.~
P.1Q60 P:.1Q0
. 4% p T
T:. 1.1.1.
T: 39Q.
T:. 3N T:
U :.111~. [
Note 5 U
u tt 9
7.
nsate Pump Cond. Pol ishers BF Pump Steam Generators Cond. Booster Pump O
l Low'IM (tvolcal 4A1' of full load):
.See Ps'. M.
P. W..
P
.621 P:.945.
-P:.936.
2
.39Q. (
Note 6 T. B3..
T:.85..
T:.3M T:.314.
T:
U y
4
- o 7
7 nsate Pump C5W. Polishers 8F Pure Steam Generators
)
4 Please attach cooles of the heat balance disorams for your actual full load and twolcal low load.
9 L..,
....,J
9:
PWR EROSION-CORROSION QUESTIONNAIRE NOTES (1 )..
Components are elbows, tees, reducers and straight pipe.
(2)
Inspection frequency is based on estimated safe operating life (remaining' years before pipe wall will reach minimum wall thickness) which is based on an erosion / corrosion rate.
(3)
Totals shown are for components in the Feedwater System that are exposed to flowing. fluid during power operation.
(4)
Maximum wet steam flow velocity ranges between 125 fps to 263 fps depending upon service. The 263 fps velocity occurs in the 10th stage (low pressure) extraction line between a common header and isolation valves. These velocities are based on manufacturers heat balance, not actual plant flow conditions which are slightly higher.
(5)
Parameters based upon PEPSE heat balance.
(6)
TMI-1 does not have a typical low load condition. 48% load values are provided as the plant does not normally operate at lower loads for
- extended periods of time. These values are from actual plant data from
. October. 30, 1985.
- (7).
Based on flow from 1 pump of 8 x 106 lbs/hr.
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