ML20079N236
| ML20079N236 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 11/11/1991 |
| From: | FLORIDA POWER & LIGHT CO. |
| To: | |
| References | |
| RTR-NUREG-1437 AR, S, WM, NUDOCS 9111110123 | |
| Download: ML20079N236 (9) | |
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4 i AOUATIC RESOURCE (TURKEY POIN.T_).
- 1. Post-licensing modifications and/or changes in operations of intake and/or discharge systems may have altered the effects of the power plant on aquatic resources, or may have been made Specifically to mitigate impacts that were not anticipated in the design of the plant. Describe any such modifications and/or operational changes to the condenser cooling water intake and discharge systems since the issuance of the operating License (or Provisional operating License).
RESPONSE
The Turkey Point Plant site has four power generating units.
Two of the units are oil / natural gas fired (Units 1 and 2) while the other two (Units 3 and 4) are nuclear units. When Units 1 and 2 were brought on-line in the mid-60's, once through cooling water was withdrawn from Biscayne Bay.
Cooling water was discharged through a canal to Card Sound.
When Units 3 and 4 were first planned, it was expected that the units' condensers would utilize once through cooling water, however, environmental concerns over the discharge of heated water to Card Sound ultimately led to the construction of the cooling canal system. When Units 3 and 4 were brought on-line, a complex closed cycle canal system with some 168 miles of canals was utilized for condenser cooling water. The cooling system intake from Biscayne Bay and the discharge to Card Sound were permanently closed off, thus, the only effect
>- on the canal system from adjacent waters is tidal. Other than tidal effects, precipitation is the only factor significantly affecting canal system water levels.
Since the closed cycle system was constructed, there have been no major changes to its configuration, although routine canal system maintenance is performed to maintain the efficiency of the system. No mitigation resulting from detrimental impact on aquatic resources is required since the coolinej canal system is a dedicated heat sink for all four generating units ht the site and thus- serves no other commercial or recreational purpose. The system does provide habitat for wildlife, including endangered species.
- 2. Summarize and describe (or provide documentation of) any known impacts to aquatic resources (e.g., fish kills, violations of discharge permit conditions) or NPDES enforcement actions that have occurred since issuance of the operating License (or 3~
Provisional operating License). How have these been resolved or changed over time? The response to this item should ;
i indicate whether impacts are ongoing or were the result of start-up problems that were subsequently resolved.
9111110123 911111 PCR NUREQ 1437 C PDR
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RESPONSE .
At pres;nt the closed cycle cooling canal system waters are not defined by EPA as " waters of the United States"and thus wastewater discharges to the canal system are not subject to steam electric guideline effluent limitations. An NPDES permit has been issued for the plant which contains the same basic " boiler-plate" language as in most NPDES permits, as well as requirements for monitoring cooling canal waters for five parameters, generally viewed as water quality indicators.
The plant has not been subject to any enforcement actions related to the NPDES permit. Further, the plant has not violated any effluent limits since none are contained in the permit. The cooling canal system water quality has assentially " stabilized" with the only significant change being salinity.
- 3. Changes to the National Pollutant Discharge Elimination System (NPDES) permit during operation of the plant could indicate whether water quality parameters were detc.rmined to have no significant impacts (and were drcpped from monitoring requirements) or were subacquently raised as a water quality issue -(and were added to the monitoring requirements).
Provide a brief summary of changes (and when they occurred) to the NPDES permit for the plant since issuance of the Operating License or Provisional Operating License.
RESPONSE
Since the plant began using the closed cycle cooling canal system, no wastewater is discharged from the plant to " Waters -
of the United States". The plant's NPDES permit only requires the monitoring of five parameters from a single location within the cooling canal system. These parametera are routinely monitored and reported to the Environmental Protection Agency as - indicator paramotors. There have not been any substantiative changes to the NPDES permit since first issued in the early 1970's. Cooling canal waters have essentially stabilized from a water quality perspective and no significant cooling canal water quality issues have been raised since the NPDES permit was issued.
In the 1970's and early 1980's the Appendix B Environmental Technical Specifications required extensive water quality and biological monitoring in the cooling canal system waters, as well as terrestrial surveillance programs on the canal embankments and surrounding wetland a16as. In the mid-1980's those monitoring programs were deleted from the technical specifications since no detrimental environmental impact was being observed. The Technical Specifications were replaced with an Environmental Protection Plan for Units 3 and 4 which requires only reporting of non-routine events to the Nuclear Regulatory Commission. To date, no non-routine events, other
than notice of the NPDES Permit renewal, have been reported to the NRC under provisions of the Plan.
- 4. An examination of time trends in the results of aquatic resources ronitoring can indicate whether impacts have increased, decraased, or remained relatively stable during operation. Describe and summarize (or provide documentation of) results of monitoring of water quality and aquatic biota (e.g., rnlated to NPDES permits, Environmental Technical Specifications, site-specific monitoring required by federal or state agencies). What trends are apparent over tinc?
RESPONSE
No water quality trendo in the cooling canal waters are apparant. Cooling canal nystem chemistry has generally stabilized, although, souc inorganic scaling of cooling system piping has occurred in the plant's main condensers and auxiliary equipment heat exchangers. At present, the inorganic scaling and limited microbiofouling is controlled by on-line physical cleaning systems and chemical injection control.
Over time the cooling canal water quality has remained relatively stable and no water quality trends are apparent other than natural salinity fluctuations. Fish populations that require oceanic waters to reproduce have declined and have been replaced by fish populations that can reprodtco in the system.
- 5. Summarize types and numbers (or provide documentation) of organisms entrained and impinged by the condenser cooling water system. Describe any seasonal patterns associated with entrainment and impingement. How has entrainment and impingement changed over time?
RESPONSE
The plant's condenser cooling water is provided by a closed cycle canal system. As a result, no make-up from adjacent surface waters occurs which would serve to recruit aquatic organisms to the canal system. Thus impingement and entrainment is not significant. Some isolated populations of non-game fish have become established in the canal system, but are not impinged or not entrained in significant numbers.
The cooling canal system was originally filled by natural flow from Biscayne Bay. At the time of the initial filling, marine biota native to the Bay worn in the water column flowing into the canal system. After the system was closed off from the bay no marine or.Janism recruitment occurred and populations of organisms physiologically suited for the canal waters survived whereas other organisms diminished over time. The most significant physical f actors influencing organism survival is i
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4 the fluctuating salinity of the canal water due to South Florida's vot/ dry season cycles as well as thermal influence f rom the plant cooling water system. The existing populations of organisms tolerant of the calinity and thermal influences has stabilized.
The biological communities presently found in the canal system are not expected to change significantly over the short term, thus, impingement and entrainment is not expected to change significantly nor will canal system water quality or plant operations; in general cause any detrimental impact on area surface waters.
- 6. Aquatic habitat enhanceme... or restoration efforts (e.g.,
anadromous fish runs) during operation may have enhanced the biological communities in the vicinity of the plant and increased its impacts beyond that originally anticipated.
Alternatively, degradation of habitat or water quality may have resulted in loss of biological resources near the site that were unrelated to plant operation. Describe any changes to aquatic habits (both enhancement and degradation) in the vicinity of the power plant since the issuance of the operating License (or Provisional Operating License) that may have altered the actual or perceived impacts of the plant.
RESPONSE
Because the plant's cooling water system is closed cycle, adjacent Biscayne Bay waters are not adversely affected by plant operation. Other than habitat alteratic,n which took place during plant and cooling system construction, no significant habitat loss has occurred. Some mangrove areas to the south and scutheast of the plant have been filled due to auxiliary building canstruction and parking lot expansion, but in terms of the who e site have not tosulted in rW1:se impact to area biota.
Because the cooling canal system covers so much area and is protected from impact from the public, primarily for security reasons, it provides habitat for a variety of wildlife including a number of endangered and threatened plants and animals. Of particular note is a population of American crocodiles, which have inhabited the cooling canals. Further, FPL monitors the crocodile population and activity regularly and enhances habitat where practicable.
- 7. Plant operations may have had positive, negative, or no impacts on the use of aquatic resources by others. Harvest by commercial or recreational fisherman may be constrained by plant operation, or may be relatively large compared with fish losses caused by the plant. Describe (or provide documentation for) other nearby uses of waters affected by
, cooling water systems (e.g. , swimming, boating, annual harvest
l
, j by commercial and recreational fisheries) and how these have changed since issuance of the Operating License or Provisional Operating License.
RESPONSE
The power plant cooling canal system is closed cycle and contains no fishery of recreational or commercial value.
Since there is no access to the system by the general public, the power plant operations do not constrain any recreational or commercial use of the areas adjacent to the plant. The nearest area of public use is Biscayne Bay, just east and south of the plant property. Plant operations Jo not have any kncwn effect on Biscayne Bay or card Sound water quality or biotic resources.
- 8. Describe other sources of impacts to aquatic resources (e.g. ,
industrial- discharges, other power plants, agricultural runof f) that could contribute to cumulative impacts. What are
'the relative contributions of these sources to overall water quality degradation and losses of aquatic biota?
RESPONSE
The Turkey Point Plant is in an isolated area with no commercial, manufacturing or other industrial activity in the immediate area. Most of the areas west and north of the site are truck farming operations and ornamer.tal plant nurseries.
These areas are relatively flat and probably do not contribute any runoff to the Plant's closed cooling canal system. The Biscayne Bay area due east of the plant site is designated as a National Park, therefore, industrial and commercial development of the general area where the plant is located is prohibited.
As previously described, the condenser cooling wat2r is provided by a closed cycle cooling canal syster, the operation of which has no known impact on arva surface waters.
- 9. Provide - documents used to support Section 316(a) and (b) demonstrations. What 316(a) and (b)-determinations have been made by the regulatory authorities?
RESPONSE
Since the plant condenser cooling water is provided by a closed cycle cooling canal system, no 316(a) or (b) studies I have been conducted.
1 E
HQqLQELQb. " QUISTIONS
- 1. To understand the importance of the plant and the degree of its socioeconomic impacts on the local region, estimate the number of permanont workers on-site for the most recent year for which data are available.
RESPONSE
Turkey Point Plant - July 1, 1990 Actual Complement - 972 St. Lucie Plant - June 1, 1990 Authorized Complement - 752
- 2. To understand the importance of the plant to the loca' region, and how that has changed over time, estirate the average number of permanent workers on site, in five-year increments starting with the issuance of the plant's operating License.
If possible, provide this information for each unit at a plant site.
RESPONSE
Turkey Point Staffing History Authorized IgAt Total 1983* 497 1984 565 1985 618 1986 633 1987 704 1988 811 1989** 915 1990 968
- Information not available prior to 1983
- (December 31, 1989 Actual Total Complement: 930)
- St. Lucie Staffing ilistory Actual 1EAE IDtAl 1979 251 1980 303 1981 385 1982 455 1983 498 1984 527 1985 565 1986 643 1987 703 1988 698 1989 731
- 3. To understand the potential impact of continued operation for an additional 20 years beyond the original licensing term, please provide for the following three cases:
A. a typical planned outage B. an ISI outaget and C. the largest single outage (in terms of the number of workers involved) that has occurred to date an estinate of additional workers involved (for the entire outage and for each principal task), length of outage, months and year in which work occurred, and cost. Also, pstimate occupational doses received by permanent and temporary workers during each principal task.
RESPONSE
(See next page for tabular response) n
RESPONSE
Turkey Point Additional Length Workers of Cost Doses Involved Outane iMil1Len1 JMan Rem)
Typical Planned =1000 465-105 =19-20 4400 Outage days ISI Outage N/A - ISI activitics performed during typical planned outage.
Largest Single 41200 PTN-3 =163 =2100 Outage (Steam Feb.81-Generator April 82 Replacement) PTN-4 Oct.82-May 83 St. Lucio Additional Length Workors of Cort Doses Involved Outace IHillion) (Man Rcm)
Typical Planned 800-1000 =65 da. 218-22 Unit 1 -
Outage =400 Unit 2 -
=250 ISI Outage N/A - ISI activities performed during typical planned outage.
Largest Single 800-1000 Mar.83 -
457 =2000*
Outage (Core May 84 Support Barrel -
St. Lucie Unit 1) e
- Includes Core Support Barrel Repair and all other outage related activities
- 4. To understand the plant's fiscal importance to specific jurisdictions, for 1980, 1985, and the latest year for which data are available, entinate the entire plant's taxable assessed value and the amount of taxes paid to the state and to each local taxing jurisdiction.
IES2ONSE Turkey Point St. Lucio 1980 Assessed Value* $167,245,292 $293,765,716**
Taxes Paid **** $3,194,385 $5,317,159 123.5 -
Assessed Value* $301,431,348 $970,546,770 Taxes Paid **** $5,064,047 $15,334,639 1989 Assessed Value $366,715,762 $933,427,716***
Taxes Paid **** $8,186,504 $17,211,567 NOTES:
- Information for 1980 and 1985 is estimated
- 1980 Property Tax Information for St. Lucie includes Unit 1 only
- Assessed Value for St. Lucie 1989 Reflects Assessed Value Reduction in Agreement with County Property App' raiser.
- Taxes are local only; n2 state taxes paid.
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