ML20203F355
| ML20203F355 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 07/29/1986 |
| From: | George Thomas PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| SBN-1174, NUDOCS 8607310048 | |
| Download: ML20203F355 (5) | |
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seoroe s inomos Vice President Nuclear Production July 29,1986 New Hampshire Yankee Division SBN-1174 T.F. B7.1.2 United States Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5
References:
(a) Construction Permit CPPR-135 and CPPR-136, Docket Nos.
50-443 and 50-444.
(b) PSNH Letter (SBN-ll66), dated July 21, 1986 " Temporary Onsite Storage of Low Level Radioactive Waste (LLRW)"
G. S. Thomas to V. S. Noonan Subj ect: Maximum Expected Waste Generated by Steam Generator Blowdown Evaporators
Dear Sir:
In response to NHY's letter of July 21, 1986, Reference (b), additional information was requested by your staff regarding the volume of waste that could be generated from the operation of the Steam Generator Blowdown (SGBD) evaporators.
The volume of waste generated from the SGBD evaporators, at the maximum primary to secondary leak rate allowed by Seabrook Station Tecgnical Specification 3.4.6.2.(c), is expected to be approximately 7ft per day.
Additionally, Seabrook Station's Secondary Chemistry Program would restrict plant operations af ter seven days as a result of exceeding action level chemistry parameters. The anticipated total volume of waste for Seabrook Station, using a cement solidification factor of 1.4, would not be expected to exceed 71ft.3, The attached enclosure provides the calculations to support the expected total voiama of waste.
If you have any questions regarding this matter, please contact Dr. Jerry Kwasnik at (603) 474-9574, extension 4053.
Very truly yours, 3
86073 fo p
PDR g
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homas Enclosure I
cc: ASLB Service List i
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l P.O. Box 300. Seabrook, NH 03874. Telephone (603) 474-9574
y ENCLOSURE TO SBN-1174 CALCULATION - WASTE VOLUME FROM STEAM CENERATOR BLOWDOON EVAPORATORS Parameters 1.
Primary to Secondary leakage at maximum allowed by Technical Specification 3.4.6.2.(c) 500 gal / day 4
2.
Major contribution to evaporator solids i
a)
Boric Acid - from leak:
Reactor Coolant Boron 500 PPM b)
Filterable Solids - Predominantly iron and copper sludge:
1800 lbs/yr.
Reference - EPRI reports NP-2977 NP-516 c)
Dissolved Solids - ionic constituents:
limited by Secondary Chemistry Program.
Cation conductivity limit would j
restrict significant dissolved solids to
<<0.lPPM 1
3.
Solids are concentrated to 12% W/0 Reference - FSAR Chapter 11.2 4.
Cement solidification volume increase factor 1.4 5.
Secondary Chemistry Program would restrict power operations after l,
seven days as a result of the action level parameter for cation conductivity with boric acid in the Steam Generator in excess of 4 PPM.
Calculation a)
Boric Acid Contribution (lbs/ day) i
(
= (.35GPM)(500 PPM Boron)(6.lConversion)(3.78 / gal)(1440 min / day) 1 5
(4.54.x 10 mg/lb)
= 12.8 lbs/ day t
b)
Filterable Solids Contribution (1bs/ day) i
= (1800 lbs/yr)
(365 day /yr)
= 4.9 lbs/ day i
Page 1
i c)
Dissolved Solids contribution (lbs/ day)
= (0.lmg/1)(3.78 1/ gal)(32,000GPM)(1440 min / day) 5 (4.54 x 10 mg/lb)
= 38.3 lbs/ day 3
d)
Concentrates Volume (ft / day)
= (12.8 + 4.9 + 38.3) lbs solids / day
(
lbs solids )
(0.12 lb solution) x (62.4 lbs water /f t )(1.04) 3
= 7.2 ft.3/ day e)
Seven Day Generation 3
= 7.2 ft / day x 7 days 3
= 50.4 ft f)
Solidified Volume 3
= 50.4 ft x 1.4 (volume increase) 3
= 70.6 ft Page 2 l
EPRI NP-2977
.g Project S113-1 Final Report April 1983 Table 2-4 ESTIMATES OF THE QUANTITY OF SECONDARY SYSTEM CORROSION PRODUCTS PLAWT
' CORROSION PRODUCT TRANSPORT IN FEEDNATER CARBON STEEL (CS)
RATINd2I PER TEN 80 NTH'S OPER ATIONI33 I0I CORR 0510N FEEDWATER 1RON COPPER 1RON COPPER IRON FLOW r0NC.(SI CON:.( 5) orgog(6) or!DE(6)
ESilMAT(f)
C5 AREAL OX1DE(6)
IFe)
(Cu)
(Fe3 4)
(Cual (Fe3 4) 0 0
mdt LBS/ ira 106 ppb ppb LBS/YR L8/YR Ft2 Lesfyg lity) 15 10 2
1511 274 114.000 642 900 11 10 2
1108 201 100,000 564 500 7
10 2
705 128 68,000 384 NOTE S:
(1) The corrosion prohet estimates in this table are hypothetical. They are intended to illustrate the* range of iron and copper corrosion products that may be proeJced in Se:ondary systems.
(2) Plant ratirgs are representative of PWR plants.
(3) The feedwater tren and cepper constituents are assumed to enter the steam generator.
(4) These data were Calculated assuming a Corrosion rate of 0.1 mil /yr.
(5) Typical tron (Fe) and copper (Cu) concentrations recoroed in operating logs for nomal operation are: <10 pph Fe, <2 ppb Cu.
(6) Feed.ater corrosion products see primarily magnetite and copper oxide; steam generator stud 2e is primarily magnetite and elemental copper.
(7) Estimated areas based on detall study of one plant and adjusted for plants of dif ferent rating. Piping and equipment are assumed to be carbon steel and the surface areas are assamed to vary as the power ratfeg retto raised tc the two tileds esponent. Heat transfer tubing is assumed to be copper alloy and the surf a:e aress are assumed to vary directly with the power rating. The heat traisfer surf ace area is appronf metely 14 m the pf pe and equipment carbon steel area.
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f
EPRI NP-516
'W 'A 4 '
Project 404-1 Interim Report February 1977 TABLE 8.2A PRAIRIE ISLAND 1 & 2 COMPOSIfION OF STEAM GENERATOR BLOWDOWN FILTERABLES Steam Generator 11 11 12 12 21 22 22 Chromium 0.31%
0.30%
0.27%
0.27%
0.46%
0.57%
0.45%
Manganese 0.43%
0.32%
0.70%
0.31%
0.27%
0.36%
0.56%
Iron 81%
79%
81%
73%
94%
89'%
~87%
<330.
<257.
<277
<238.
<317.
<286.
<305.
Nickel 3.2%
'O.66%
1.2%
0.6?%
0.56%
0.70%
0.91%
Copper O.21%
0.45%
0.13%
0.19%
0.15%
0.18%
0.19%
-Zinc 508.
432.
693.
361.
0.10%
808.
488.
<29.
<22.
<26.
<21.
<23.
<25.
<24.
Lead 0.12%
0.14%
696.
0.13%
727.
0.11%
454.
<27.
<24.
<23.
<20.
<21.
<23.
<21.
<145, 287.
<139.
4246.
4100.
<171.
<200.
Cadmium (194.
<105.
<139.
5150.
<100.
<171.
<200.
l Titanium
<895.
<908.
<823.
<720.
1.2%
1.6%
1.9%
<205.
<215.
<255.
<190.
<250.
<470.
<366.
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Sample 11/28 to 1/9 to 11/13 to 11/21 to 11/19 to 11/15 to 1/28 to Period 11/30/75 1/11/76 11/15/75 12/24/75 11/20/75 11/17/75 1/30/76 Concentrations in ppm unless otherwise stated.
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