NC0039586_Waste Load Allocation_19890516

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCOO 3 1:58C
FACILITY NAME: Cle+ L �ktAf a
Facility Status: ExiS'1' G - PROPOSED
(circle ons)
Permit Status:..__RENEWAL. ��AMON_UNPERbffff D . NEW
(circle one)
Major X Minor
Pipe No:
Design ,Capacity (MGD):
Domestic (Z of Flow):
Industrial (% of Flow): K
Comments: [pecmif 4( At zs << 66,411
1 I r. I t
4111azeAk`k:Ma stiay.li Lt-rpt,tL t4 T;nal l:sc(nar�e
RECEIVING STREAM: t'(arris Rzscryo; r
Classy Sub -Basin: - 03060'7
Reference USGS Quad: (please attach)
County: C kotko m
Regional Officer As FaMo. dta Wa Wi WS
'(circle one)
Requested By: Date:
Prepared By: &,Q �, �.,A Date:
Reviewed By:__Z&11 6�-Date:
Modeler
Date Rec.
#
m03 d
5-114/ 8j___j
'�
Drainage Area (mit) Avg.. Streamflow (cfs): ,
K -j -
7Q10 (cfs) 6.0 Winter 7Q10 (cfs) 30Q2 (cfs)
MiMN►1A►1 %togas. = O �t
Toxicity Limits: IWC % (circle one) Acute / Chronic
Instream Monitoring:. .
Parameters
Upstream Location
Downstream Location
- an
r
1
Effluent
Characteristics
Summer
Winter
BODS (mg/1)
NH3 N (mg/1)
d
D.O. (mg/1)
i
rr. iC+'d
SSS � l
TSS (mg'/1)
F. Col. U100m1)
pH (SU)
I)a, MAK
^
('QZl M',�
2.
p�r►.►9 pa��ads of
W I0,
0,6_14S a'f A1(
;'ti tK f-
uc•n ?W -t 4LWC
a -u ' 60
Comments: � Vle 4!j 2 X1°9% +o TNn
_I 1 +, 1.
L- 11
- Idtj.
1 1 1' 1(I ( b att //�ff 11re$MCAcj c�bV i ^ eecMIT tc, nol ►mare. jka�1 24 hrs,
tir�lI,(Y . c,fMn nA-1 rr _4�a.... YM. d-rril.T•�/ 4-,. `1._ � P:M 0C w/� (n,/-lAo -OJ1/111 or;m io f�'MIC OCGGifiO

-FOR APPROPRIATE DISCHARGERS, LIST COMPLETE GUIDELINE LIMITATIONS BELOW
Effluent Characteristics
Monthly
DailyAverage Maximum
Comments
L
ilk,ta.
'
Type of Product Produced Lbs/Day Produced Effluent Guideline Reference

Request No
------------------- WASTELOAD ALLOCATION APPROVAL FORM --- ----------------
Facility Name: CP&L SHEARON HARRIS NUCLEAR POWER PLAT
NPDES No.: NCO0345B6 �r
Type of Waste: INDUSTRIAL R4CRIGl�R %989
Status: EXISTING
Receiving Stream: HARRIS RESERVOIR
Classification: C AFF/C�
Subbasin: 030607 Drainage area: sq mi
County: CHATHAM Summer 7Q10: cfs
Regional Office: RALEIGH ® Winter- 7010: cfs
Requestor: Average flow: cfs
Date of Request: 30Q2: cfs
Quad: E23SW
-------------------- RECOMMENDED EFFLUENT LIMITS -------------------------
Daily Max.
Hydrazine (ug/1): 60
Hydrazine (mg/1): 2 During periods of wet lay-up�'u
y' y h 1 r ,1._, 1D,
(See �omments ) RE M/I7�`y/ 2f p(��
a ------ MONITORING ---------- a rti o ver �r-----------_ PERMITS u 1NG!NEER Nr,'
-------------- --------
Upstream (Y/N): Location:
Downstream (Y/N): Location:
----------------------------- COMMENTS -----------------------------
THE NPDES PERMIT FOR THIS FACILITY SHOULD BE MODIFIED TO INCLUDE A
HYDRAZINE LIMIT OF 60 UG/L, EXCEPT DURING PERIODS OF WET LAY-UP; WHEN
A HYDRAZINE LIMIT OF 2.0 MG/L SHOULD BE ALLOWED. THE 60 UG/L IS A
CHRONIC LIMIT, AND THE 2 MG/L WILL PROTECT TO THEu_dJE64 L.
THE ACUTE LIMIT SHOULD APPLY ONLY DURING WET LAY-UP^ EVENTS, WHICH
SHOULD BE RESTRICTED BY THE PERMIT TO NO MORE THAN 24 HOURS.
PERMIT SHOULD REQUIRE WRITTEN NOTICE BY THE FACILITY TO THE DEM OF
WET LAY-UP EVENTS PRIOR TO THEIR OCCURANCE.
THE HYDRAZINE LIMITS SHOULD BE APPLIED TO THE FINAL DISCHARGE.
NO OTHER PERMIT 1110DIFICATIONS SHOULD BE MADE EXCEPT FOR THE ABOVE.
Recommended by: --------- Date: f1Z �y
Reviewed by
Tech Support Supervisor: /�ur�_Date:
O V Regional Supervisor: ______ _________ Date:
Permits & Engineering: __ __ Date:
RETURN TO TECHNICAL SERVICES BY: JUN V. 1989
Q�.

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Carolina Power&, Light Company
Shearon Harris Energy & Environmental Center
Route 1. Box 327
New Hill, North Carolina 27562
FEE ; 3 1989
Mr. Dale Overcash
N.C. Division of Environmental Management
P.O. Box 27687
Raleigh, North Carolina 27611-7687
Dear Mr. Overcash:
SERIAL NO.: ESS -89-183
i
RE: Shearon Harris Nuclear Power Plant
NPDES Permit No. NC0039586
Information on Chemical Wastes
As you recall in a recent meeting with Mr. Cam Wheeler of CP&L, you
requested additional. _nformation on the use and disposal of hydrazine at the
--Harris Plant„ Please find enclosed a sumtr ary description of how hydrazine
wastes are generated, treated, and discharged.
If you have any questions or require any further information, please
contact Mr. Cam Wheeler in our general office at 836-6725.
CCW:dc8 (89-03CCW)
Enclosure
Yours very truly,
G. H. Warriner
Manager
Environmental Services

c^�

So�o� 4(�ei5 NUelcp2 PpWim(, Enclosure to ESS -89-1'83
'p�AtTL'
Summary Description
Hydrazine Wastes at SHNPP ! •`j6��
Hydrazine is a chemical used to remove dissolved oxygen: Oxygen promotes
general corrosion and pitting of ferrous and copper surfaces. One ppm of
hydrazine will react with one ppm of dissolved oxygen as follows to form
nitrogen and water:
NA+02 0 N2+2H20
The reaction rate is dependent upon temperature, pH, and concentration.
In addition, hydrazine thermally decomposes at temperatures above 400OF
to form ammonia.
All wastes that might contain hydrazine flow via plant drains to the low-
volume waste treatment system that consists primarily of two 230,000 gallon
neutral.izat .on basins, followed by a 1,000,000 gallon sedimentation basin.
The neutralization -sedimentation basins operate on a batch -process mode. When
the appropriate treatment levels are reached, the treated water is pumped to
the cooling tower blowdown line at 500-800 gpm.
The cooling tower blowdown line usually maintains a minimum flow of
900 gpm (1.3 MGD) even when the plant is not operating. During normal
operation, the cooling tower blowdown is a continuous flow of about 2 to
6 MGD.
Hydrazine is normally used in plant systems that treat and recycle their
blowdown, and, therefore, the small amounts of hydrazine released are due to
minor leakage or maintenance work. There are essentially four sources of
hydrazine wastes to the low-volume waste treatment system:
1. Auxiliary Boiler System: blowdown of 5-10 gpm with a hydrazine
concentration of approximately 0.1 ppm.
2. Main Steam System: No blowdown; miscellaneous leaks may produce
10-20 gallons per day at 100-300 ppb hydrazine.
3. Regeneration of condensate polishers (ion -exchange) will produce
65,000 gallons per event (every other day) with less than 50 ppb
hydrazine.
The above sources of hydrazine are such low qualities or concentrations
that after mixing with other waste flows in the neutralization basins,
the hydrazine should be well below any level of concern. The remaining
source is the only one that is likely to produce hydrazine wastes at
concentrations that might remain detectable after routine treatment.
4. Wet lay-up of steam generators and miscellaneous steam cycle
systems: When the plant is taken off-line for an extended period,
such as a refueling outage, the steam generators and steam cycle
systems may be filled with water and a hydrazine residual of
15-200 ppm is maintained to prevent corrosion. This may happen
89-03CCW

i
89-03CCW
-2-
about once per year. There are three steam generators, each with a
capacity of about 45,000 gallons. The lay-up water is drained to
the neutralization basins for treatment prior to discharge At
these times, the volume from the laid -up systems will be such that
virtually an entire neutralization basin will contain water with
hydrazine at 75-200 ppm. Normal treatment is to aerate with pumps
until the hydrazine is consumed and lowered to a concentration of
5 ppm. Lower concentrations would be achieved by additional
treatment with oxidizing agents.