ML20029D402
| ML20029D402 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 12/31/1993 |
| From: | Bowling M VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| References | |
| 94-277, NUDOCS 9405050314 | |
| Download: ML20029D402 (13) | |
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VIRGINIA Ei EcTiuC AND POWER COMI%NY H ic tin oxn, VI HO INIA 2006)
April 27, 1994 i
United States Nuclear Regulatory Commission Serial No.94-277 Attention: Document Control Desk NAPS /JHL/GSS Washington, D. C. 20555 Docket Nos.
50-338 50-339 License Nos. NPF-4 NPF-7 i
Gentlemen:
ylRGINIA ELECTRIC AND POWER COMPANY i
NORTH ANNA POWER STATION UNIT NOS.1 AND 2 ANNUAL ENVIRONMENTAL OPERATING REPORT Pursuant to Section 5.4.1 of the Appendix B Technical Specifications, Environmental Protection Plan, enclosed is the Annual Environmental Operating Report for North i
Anna Power Station Unit Nos.1 and 2 for 1993.
If you have any questions or require additional information, please contact us.
Very truly yours,
/
M. L. Bowling, Manager Nuclear Licensing and Programs Enclosure cc:
U. S. Nuclear Regulatory Commission Region 11 101 Marietta Street, N. W.
Suite 2900 Atlanta, Georgia 30323 Mr. R. D. McWhorter NRC Senior Resident inspector North Anna Power Station g
t 940505o314 931231 PDR ADOCK 0500o338
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t VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1
AND 2
APPENDIX B
ENVIRONMENTAL PROTECTION PLAN i
1993 ANNUAL REPORT i
DOCKET NOS.
50-338 AND 50-339 i
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INTRODUCTION This 1993 Environmental Operating Report for the North Anna Station is submitted by Virginia Electric and Power Company as required under Section 5.4.1 of Appendix B, Environmental Protection Plan (EPP).
The objectives of the EPP are to verify that the power station is operated in an environmentally acceptable manner, to coordinate NRC requirements, maintain consistency with other federal, state and local requirements, and to keep the NRC informed of the environmental effects of facility construction and operation.
During 1993, no significant adverse environmental impact occurred as a result of the operation of North Anna Power Station, Units 1 and 2.
Aquatic issues are addressed in the licensee's VPDES permit number VA 0052451 issued by the Virginia State Water Control Board. The VPDES permitting program is administered by the Department of Environmental Quality-Water Division and the NRC relies on this agency for regulation of i
I matters involving water quality and aquatic biota.
Listed below are the summaries and reports as required under Section 5.4.1 of the EPP.
PLANT DESIGN AND OPERATION (SECTION 3.1)
There were no changes in station design and operation proposed in 1993 that involved a potentially significant unreviewed j
environmental issue.
TRANSMISSION LINE RIGHT OF WAY HERBICIDE MANAGEMENT (SECTION 4.2.1)
The herbicide, Spike SG, was used for brush control around tower foundations on the North Anna - Morrisville, and the North (1)
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Anna - Ladysmith 500 kV lines during 1993.
No herbicides were used for brush control on the North Anna - Midlothian 500 kV line l
or the North Anna - Gordonsville 230 kV line during 1993.
TRANSMISSION LINE RIGHT OF WAY EROSION CONTROL INSPECTION (SECTION 4.2.2)
Erosion inspection on right of way was made on the North Anna - Midlothian, North Anna - Morrisville, North Anna -
Gordonsville, and North Anna - Ladysmith lines on July 16, 1993.
Locations were recorded where erosion was taking place on the North Anna - Morrisville, North Anna - Midlothian, North Anna -
i Gordonsville and the North Anna - Ladysmith lines.
Most of these locations noted were caused by vehicle travel up and down the right of way.
These areas were disced, fertilized, seeded, and mulched, with additional silt screen installed to prevent erosion.
i STATION SITE EROSION CONTROL (SECTION 4.2.2)
An on-site erosion control inspection was performed at North Anna Power Station by the Civil / Design Engineering Department beginning October 19, 1993 and ending on October 28, 1993, according to Periodic Test Procedures 1-PT-9.3, Erosion Contrc'.
Inspection - Station Site.
Although erosion was minor or non-l existent in most areas, an area near the service water valve house was determined to need topsoil addition and seeding.
A concrete l
i drainage ditch on the west side of the discharge canal contained
-l debris and needed cleaning. Two areas were determined to be too i
l overgrown to be inspected properly and were reinspected after the vegetation was removed.
During this reinspection several animal burrows were observed which needed to be filled and several l
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erosion gullies were found which were recommended to be stabilized and filled with stone.
All of the above maintenance activities have been completed.
NONCOMPLIANCE (SECTION 5.4.1)
There were no Environmental Protection Plan occurrences of noncompliance during 1993.
NONROUTINE REPORTS (SECTION 5.4.2)
Enclosed are copies of letters detailing the occurrence of four unanticipated discharges (pages 4 - 11) during 1993.
There were no oil spills or NPDES exceptions occurring in 1993.
None of the unanticipated discharges resulted in a significant environmental impact causally related to station operation.
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North Anna COR 14/ Violations l
CERTIFIED M&IL RETURN RSCRIPT REQUESTED January 22, 1993 Mr. Kemper Loyd Virginia Water Control Board Valley Regional Office 116 North Main Street P.
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Box 268 Bridgewater, VA 22812 VPDES PERMIT NO.
VA0052451 RE:
NORTH ANNA POWER STATION CONDENSATE DISCHARGr.:
Dear Mr. Loyd:
As Mr. Daniel James of my staff discussed with you by telephone on January 21, 1993, the North Anna Power Station had a discharge of condensate from the Unit 1 - condenser hotwell via a previously unreported pipe to the circulating water tunnel.
This event occurred January 8, 1993, during draining of the condenser hotwell as part of the current preparations for replacement of the Unit 1 steam generators.
The discharge consisted of an estimated 140,000 to 210,000 gallons of relatively high purity condensate water, at a pH of 8.83, containing morpholine at 0.3 ppa, nondetectable levels of boric acid, unmeasured trace amounts of hydrazine, and ammonia at <1 ppm (from the decomposition of hydrazine)..
No-pollutants 'not previously identified were involved and no violations of any permit limitations occurred.
l The drainage from the condenser hotwell should have been routed through the Outfall 003 facilities and piping.
However, due to the unusual nature of operations during this outage and the work being performee in relation to steam generator replacement, the hotwell was drained to the tunnel in the same vicinity as Outfall 003.
The circulating water tunnel discharges through the discharge canal to the waste heat treatment facility.
No new or unusual discharge to state waters was caused by this event, only a small deviation from the actual location of the proper internal outfall by an estimated 20-25 feet.
The pipa involved in this event will not be used again in the future unless it has been included in the station's VPDES permit.
Since this event has pointed out the potential for pipes to exist which have not been identified for VPDES permit purposes, a review of the station's facilities is being conducted to determine if l
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Mr. Kemper Loyd Ja.nuary 22, 1993 Page 2 j
there are any others.
Should our evaluation indicate the need for any future discharges via this pipe, or any others, the appropriate i
notifications will be made and permit authorizations obtained prior i
to such discharges.
No evidence of environmental damage was noted as a result of this 1
event nor would any be expected to occur, considering the nature of J
the water discharged.
After introduction to the circulating water tunnel, this internal discharge followed the same routing through l
j the remainder of the station's facilities as does the discharge from the authorized 003 outfall.
As noted above, the discharge consisted of relatively high purity water and no process wastes were involved.
The additives present in the water discharged were at much lower concentrations than would.be present under normal operations, and will have no impact on the station's discharge to 4
l state waters.
Should you desire additional information or have any questions i
about this matter, please contact Daniel James at (804) 273-2996.
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Sincerely, 1
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B. M. Marshall, P.E.
Manager j
Water Quality i
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cc:
U.S. Nuclear Regulatory Commission i
Region II
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101 Marietta Street, NW j
Suite 2900 Atlanta, GA 30323 Re:
North Anna Units 1 & 2 i
Docket Nos. 50-338/50-339 i
License Nos. NPF-4/NPF-7 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Re:
North Anna Unit 1 & 2 i
Docket Nos. 50-338/50-339 License Nos. NPF-4/NPF-7
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1 Mr. M. S.
Lesser NRC Senior Resident Inspector 1
North Anna Power Station 4
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4 North Anna COR 14/ Violations i
April 7, 1993 i
4 Mr. Kemper Loyd Water Regional Office Department of Environmental Quality 116 North Main Street Bridgewater; VA 22812 RE:
NORTE ANNA POWER STATION - VPDES PERMIT NO. VA0052451 l
CONDENSATE DISCEARGE
Dear Mr. Loyd:
As Mr. Daniel James of my staff d4=maad with you cy telephone on April 5,1993, the North Anna Power Statimi had a discharge of condensata to the circulating
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water tunnel from the Unit 1 condenser hotwell via a pipe not identified as an outfall in the current permit.
mis esent occurred Sunday, April 4,1993, at about 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br />.
The diacharge consisted of an estimated 30,000 gallons of high purity condensate water, at a pH of 7.5, containing hydrazine at 8 ppb. No other contaminants were 4
1 involved and no violations of any permit limitations occurred.
ne condenser hotadell drr!n was erroneously valved throu@t another pipe to the circulating water turmel in the same vicinity as the Outfall 003 pipe. Had this release been =4dy routed to the 003 outfall, it would have entered the circulating water flow within 20-25 feet of the same location. Se circulating water tunnel disdiarges throu$1 the dimeharge canal to the wasta heat trastment facility.
No changes in the station's diarharge to state water was caused by this event.
ne pipe involved in this event was not intended to be used for any other I
discharges until it has been included in the staticm's VPES permit. We valving for this discharge rauta rumains
"*W out" to preclude its use unless specifically authorized.
As noted above, this was an internal discharge which consisted of high purity water with a miralta amount of hydrazine and no process wastes were involved. The hydrazine present in the water dischargmi would not be expected to persist through the di% canal and the wasta heat treatment facility, and would have no irpact on water quality in the canal, the wasta heat treatment facility, or at the station's di % to state waters.
Should you need additicmal information or have any questicra about this matter, please contact Daniel James at 273-2996.
Sincerely, e~
B. M. Marshall, P Manager Water Quality (6)
- e. xsever toyd April 7, 1993 Pago 2 j
cc:
U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW Suite 2900 Atlanta, GA 30323 Re:
North Anna Units 1 & 2 Docket Nos. 50-338/50-339 i
License Nos. NPF-4/NPF-7 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Re:
North Anna Unit 1 & 2 Docket Nos. 50-338/50-339 License Nos. NPF-4/NPF-7 Mr. M.
S.
Lesser i
NRC Senior Resident Inspector North Anna Power Station i
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North Anna l
COR 14/ Violations j
November 5, 1993 4
Mr. Kemper Loyd l
Valley Regional Office
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Department of Environmental Quality 116 North Main Street I
P.
O.
Box 268 l
Bridgewater, VA 22812 RE:
NORTH ANNA POWER STATION - VPDES PERMIT NO. VA0052451 UNUSUAL DISCHARGE I
Dear Mr. Loyd:
j As Mr. Daniel James of my staff discussed with Bill Kreglos by 1
telephone on November 2,
- 1993, the North Anna Power Station i
experienced an unusual discharge of chromate to the clarifier from a leak in the component cooling system.
The clarifier discharges to the circulating water tunnel via Outfall 003.
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j On the late afternoon (1745) of Monday, November 1,1993 Operations personnel discovered a leak in the closed component cooling system.
j' This leak was determined to be sending 160 gallons per day through the clarifier discharge point (Outfall 003).
This discharge was
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immediately shut down and the system repaired.
It was calculated that approximately 0.7 lbs. of chromate (Cr04) had been released I
per day.
The release had been occurring for several days but it is 1
j impossible to determine exactly how long because, during the recently completed unit refueling, parts of the component cooling system were drained into tanks to allow work on various systems.
It was not until the unit was back on line and the component i
cooling system stabilized that the leak was evident and it was then i
traced to a steam generator blowdown vent condenser.
During the i
time of the release, the clarifier was also discharging water from other sources which would have given a clarifier discharge chromate j
(Cr04) level of from 0.37 to 0.54 parts per million.
i Nornally, any leaks from the component cooling system are routed l
through ion exchange treatment to remove chromate prior to discharge to the clarifier.
Immediately upon discovering the leak, l
the leaking equipment was isolated to prevent further discharge of chromate to the clarifier and the necessary repairs were made. The systems were returned to normal operation by the morning of November 2.
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d Mr. Kemper Loyd November 5, 1993 Page 2 No other contaminants were involved and no violations of any permit limitations occurred. Site. visual' inspections revealed no evidence of environmental damage in the station's discharge canal or the waste heat treatment facility.
The chromate present in the water discharged would not be expected to be detectable in the discharge canal or the waste heat treatment facility, and would have no impact on water quality in the canal, the waste heat treatment facility, or at the station's discharge to state waters.
This event was due to an unforeseeable failure of equipment.
The i
appropriate actions were taken to cease the unusual discharge and to make the necessary repairs.
No further corrective actions are needed.
Should you desire additional information or have any questions about this matter, please contact Daniel James at (804) 273-2996.
Sincerely, B. M. Marshall, P.E.
Manager water Quality cc:
U.S. Nuclear Regulatory Commission Region II 101 Marietta St., NW Suite 2900 Atlanta, GA 30323 Re:
North Anna Units 1 & 2 Docket Nos. 50-338/50-339 License Nos. NPF-4/NPF-7 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Re:
North Anna Units 1 & 2 Docket Nos. 50-338/50-339 License Nos. NPF-4/NPF-7 Mr. R. D. McWhorter NRC Senior Resident Inspector North Anna Power Station (9) 1
a North Anna COR 14/ Violations i
j CERTIFIED MAIL RETURN BBCRIPT REQUESTED i
l November 30, 1993 i
i Mr. Kemper Loyd Valley Regional Office Department of Environmental Quality 116 North Main Street j
P.
O.
Box 268 Bridgewater, VA 22812 RE:
NORTH ANNA POWER STATION - VPDES PERMIT No. VA0052451 l
UNUSUAL DISCHARGE
Dear Mr. Loyd:
i As Mr. Daniel James of my staff discussed with you by telephone on 1
November 22, 1993, the North Anna Power Station experienced an 1
unusual discharge of chromate to the clarifier from a leak in the component cooling system.
The clarifier discharges to the circulating water tunnel via Outfall 003.
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Early Monday morning (November 22) Operations personnel realized there was a leak in the closed component cooling system.
They i
immediately isolated the system and took actions to determine the source of the leak.
This leak was into the Unit 1 blow-down which is released, untreated, via the clarifier (Outfall 003) to the circulating water tunnel.
A routine sample had been taken from the clarifier at 0400 Monday, which was prior to the isolation of the component cooling system. This sample was tested and determined to j
contain 0.36 parts per million chromate (Cr04).
It was calculated j
that the daily release of chromate was approximately 0.6 lbs., and i
Operations personnel estimated the system had been leaking for several days.
j The source of the chromate leak was found to be additional heat exchanger tubes in the same component as the similar leak reported on November 2,1993.
Leaking tubes in the heat exchanger have been i
plugged to stop the loss of chromate from the system.
Studies are i
underway to determine a long term solution.
Options being considered include additional repair or replacement of tubes.
It is projected that this may be accomplished within the next few weeks.
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4 Mr. Kemper Loyd November 30, 1993 Page 2 i
Until more permanent repairs are completed, the blow-down tank j
which receives leaks from the component cooling system will be sampled every four hours, when the Unit 1 blow-down vent condenser is in service, and analyzed for chromate.
If chromate is detected in the tank, the system can be isolated to prevent additional I
untreated releases to the clarifier.
As with the previous loss of chromate from this system, no other contaminants were involved and no violations of any permit limitations occurred. ' Site visual inspections revealed no evidence of environmental damage in the station's discharge canal or the waste heat treatment facility.
The chromate present in the water l
discharged would not be expected to be detectable in the discharge canal or the waste heat treatment facility, and would have no impact on water quality in the canal, the waste heat treatment j
facility, or at the station's discharge to state waters.
Should you desire additional information or have any questions about this matter, please contact Daniel James at (804) 273-2996.
Sincerely, B. M. Marshall, P.E.
Manager Water Quality cc:
U.S. Nuclear Regulatory Commission Region.II 101 Marietta St., NW Suite 2900 Atlanta, GA 30323 Re:
North Anna Units 1 & 2 Docket Nos. 50-338/50-339 License Nos. NPF-4/NPF-7 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Re:
North Anna Units 1 & 2 Docket Nos. 50-338/50-339 License Nos. NPF-4/NPF-7 Mr. R.
D. McWhorter NRC Senior Resident Inspector North Anna Power Station (11)
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