ML081270092

Annual Environmental Operating Report 2007

ML081270092
Person / Time
Site:	Wolf Creek
Issue date:	04/27/2008
From:	Flannigan R Wolf Creek
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RA 08-0036
Download: ML081270092 (10)

Text

WF CREEK "NUCLEAR OPERATING CORPORATION April 27 , 2008 Richard D. Flannigan Manager Regulatory Affairs RA 08-0036 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Subject:

Docket No. 50-482: 2007 Annual Environmental: Operating Report Gentlemen:

Enclosed is the Annual Environmental Operating Report, which is being submitted pursuant- to.

Wolf Creek Generating Station (WCGS) Facility Operating License NPF-42, Appendix B. This report covers the operation of WCGS for the period of January 1, 2007, through December 31, 2007.

No commitments are identified in this correspondence. If you have any questions. concerning this matter, please contact me at (620) 364-4117, or.Ms. Diane Hooper (620) 364-4041..

Sincerely, Richard D. Flannigan RDF/rlt Enclosure cc: E. E. Collins (NRC), w/e V. G. Gaddy (NRC), w/e B. K. Singal (NRC), w/e Senior Resident Inspector (NRC), .w/e P.O. Box 411 / Burlington, KS 66839 / Phone: (620) 364-8831 An Equal Opportunity Employer M/F/HCNVET

WOLF CREEK GENERATING STATION ANNUAL ENVIRONMENTAL OPERATING REPORT 2007 ENVIRONMENTAL MANAGEMENT ORGANIZATION WOLF CREEK NUCLEAR OPERATING CORPORATION P.O. BOX 411 BURLINGTON, KANSAS 66839 April 2008

TABLE OF CONTENTS 1.0 INT RO DUCT IO N ............................................................................................. 3 2.0 ENVIRONMENTAL MONITORING ............................................ 3 2.1 AQUATIC [Environmental Protection Plan (EPP) Section 2.1] ...... 3 2.1.1 Impacts of Water Withdrawal on the Neosho River ................. 3 2.1.2 Oxidizing Biocide Discharges to Coffey County Lake ........ ....... 3 2.1.3 C old S hock .......................................................................... .. 4 2.1.4 Im pingement and Entrainment ................................................ 4 2.1.5 Impacts of Coffey County Lake Discharges ........................... 5 2.2 TERRESTRIAL [EPP Section 2.2] ...................................................... 5 2.2.1 Control of Vegetation in the Exclusion Zone .............. 5 2.2.2 Vegetation Buffer Zone Surrounding Coffey County Lake ........ 5 2.2.3 Herbicide Use for Maintenance of WCGS Structures .............. 5 2.2.4 Waterfowl Disease Contingency Plan and Monitoring ............. 6 2.2.5 Fog Monitoring Program [EPP Subsection 4.2.1] ........ .....6 2.2.6 Wildlife Monitoring Program [EPP Subsection 4.2.2] ............. 6 2.2.7 Land Management Program [EPP Subsection 4.2.3] ............. 7 3.0 ENVIRONMENTAL PROTECTION PLAN REPORTING REQUIREMENTS ........ 7 3.1 PLANT DESIGN OR OPERATION CHANGES [EPP Section 3.1] ..... 7 3.2 NON-ROUTINE ENVIRONMENTAL REPORTS .................................. 7 3.2.1 Subm itted Non-routine Reports ....................................... .......... 7 3.2.2 Unusual or Important Environmental Event Evaluations.......... 7 3.3 ENVIRONMENTAL NONCOMPLIANCES [EPP Subsection 5.4.1] ....... 7 4.0

SUMMARY

OF ENVIRONMENTAL INVESTIGATIONS AT WOLF CREEK G ENERA TING STATIO N................................................................................ 8 4.1 2007 LAND MANAGEMENT ACTIVITIES ............................................ 8 4.2 2007 ZEBRA MUSSEL MONITORING ACTIVITIES .............................. 9 4.3 2007 FISHERY MONITORING ACTIVITIES ..................... 9 2

1.0 INTRODUCTION

The 2007 Annual Environmental Operating Report is being submitted in accordance with the objectives of the Environmental Protection Plan (EPP), Appendix B to the Facility Operating License NPF-42. The purpose of this report is to demonstrate that the Wolf Creek Generating Station (WCGS) operated during 2007 in a manner protective of the environment.

2.0 ENVIRONMENTAL MONITORING 2.1 AQUATIC [EPP Section 2.1]

2.1.1 Impacts of Water Withdrawal on the Neosho River The WCGS Final Environmental Statement/Operating License Stage (FES/OLS, Section 5.6), NUREG-0878, postulated that makeup water withdrawal of 41 cubic feet per second (cfs) during drought conditions would extend the duration and severity of low-flow conditions below John Redmond Reservoir (JRR). This, in turn, was expected to reduce riffle habitat that would adversely affect the Neosho madtom, now a federally listed threatened species.

Makeup water was not pumped during 2007, thus the Neosho River flows were not impacted. Minimal flow for auxiliary raw water was pumped for short durations from June 1 through June 4, June 19 through July 1, and December 14 through December 27, 2007. Pump rates ranged from one to two cfs. Total pumped was 24.568 million gallons, which for 2007, was equivalent to 0.1 cfs average, or 0.2 percent of the 41 cfs assessed above. Significant influences on the downstream flows measured at Burlington were not detected. Therefore, there were no adverse impacts to the Neosho River or Neosho madtom habitats attributable to WCGS water withdrawal during 2007.

2.1.2 Oxidizing Biocide Discharges to Coffey County Lake Circulating Water System (CWS) Discharge:

Biocide use at WCGS was predicted to cause periodic, appreciable mortality in a conservatively estimated 40 acres of the discharge area to Coffey County Lake (CCL). However, these impacts were not expected to meaningfully affect the overall biological productivity of the lake (FES/OLS, Section 5.5.2.2). The postulated biocide levels expected to cause the impacts were from 0.68 to 1.08 mg/I of total residual chlorine at the CWS discharge (FES/OLS, Section 4.2.6.1).

Three 30-minute doses per day of 411 pounds of chlorine per dose were projected to produce these concentrations.

Impacts from actual biocide use during 2007 were considered to be less than postulated in the FES/OLS. A sodium .hypochlorite and sodium bromide formulation was used to control biological fouling in WCGS cooling water systems during 2007. Evaluations completed at WCGS demonstrated that the sodium hypochlorite and sodium bromide formulation would not have greater impacts to the cooling lake environment than those expected from the level of chlorine use identified in the FES/OLS. All changes were reviewed and 3

approved by the Kansas Department of Health and Environment'(KDHE) prior to implementation.

The WCGS National Pollutant Discharge Elimination System (NPDES, Number I-NE07-PO02) permit limits biocide discharges to levels lower than postulated in the FES/OLS. This permit was administered by the KDHE. The biocide level for the CWS was limited to a maximum of 0.2 mg/I, total residual oxidant (TRO), for a maximum of two hours per day. Compliance during 2007 was 100 percent.

Actual oxidizing biocide dosages averaged approximately 49.9 pounds per day and the daily average TRO was 0.08 mg/I.

Essential Service Water System (ESWS) Discharge:

During 2007, a continuous diversion of approximately 17,000 gallons per minute of WCGS Service Water System (SWS) flow to the ESWS was completed to provide microbiologically induced corrosion protection and sedimentation control.

The KDHE established a 1.0 mg/I TRO limit for the SWS flow diversion through the ESWS. Actual measurements of TRO averaged 0.11 mg/I, and compliance with the NPDES limit in 2007 was 100 percent. No fish mortality or water quality changes attributable to ESWS biocide discharges were observed. Based on this information, permitted biocide discharge during 2007 did not have appreciable effects on the cooling lake environment.

2.1.3 Cold Shock In the event of a rapid decline in plant power level during winter, fishes attracted to the WCGS heated discharge could experience mortality due to a quick reduction in body temperature (cold shock). In reference to licensing document evaluations, the WCGS EPP Section 2.1 (c) states, "Cold shock effects on fish due to reactor shutdowns could cause significant mortality to aquatic species in the cooling lake."

No adverse impacts due to cold shock mortality events occurred during 2007.

There were no plant shutdowns during 2007. Small reductions in power occurred on May 16, May 25, May 26, and June 11, 2007, which were all during periods when fish avoid the thermal discharge due to high temperatures.

Consequently, fish were not exposed to potential cold-shock mortality during 2007.

2.1.4 Impingement and Entrainment Impacts of entrainment and impingement of fish and aquatic organisms due WCGS cooling water pumping were projected to be significant, as indicated in the WCGS EPP, Section 2.1 (d). EPP Section 2.1 states that the NRC relies on the State of Kansas for determination of the need for monitoring entrainment and impingement impacts. The State of Kansas has requested WCGS to monitor impingement impacts for the Clean Water Act 316 (b), Phase II regulations with a report to be submitted to the KDHE in 2008. Entrainment monitoring has not been required. Periodic observations during 2007 indicated that fish impingement at the WCGS circulating water intake was negligible.

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2.1.5 Impacts of Coffey County Lake Discharges to the Neosho River The WCGS NPDES permit requires that CCL discharges be sampled on the first day of each discharge and weekly thereafter until the end of each respective discharge. A discharge limit was set for pH (NPDES Outfall 004). There were no NPDES violations from discharges from CCL, and no detrimental effects occurred to the Neosho River water quality in 2007.

2.2 TERRESTRIAL [EPP Section 2.2]

2.2.1 Control of Vegetation in the Exclusion Zone The composition and structure of vegetation in the 453 hectare (1120 acre) exclusion zone were selectively controlled to be compatible with the function and security of station facilities. Most areas in the immediate vicinity of the power block have been planted and maintained in a lawn-type condition. Other areas within the exclusion area have been mowed for security and aesthetic purposes.

There were no significant changes in overall vegetation management of the exclusion zone during 2007.

2.2.2 Vegetation Buffer Zone Surrounding Coffey County Lake To create a buffer zone of least 500 acres around CCL, as specified in EPP Section 2.2 (b), agricultural production activities were curtailed in 1980 within a border ranging from approximately 200-400 feet adjacent to the lake shoreline.

This area is approximately 1440 acres. Previously grazed or hayed native grass areas were left undisturbed. Previously cultivated lands were allowed to advance through natural succession stages, or native grasses were established in these areas. Land management activities included controlled burning to enhance and/or maintain the designated buffer zone with a naturally occurring biotic community.

2.2.3 Herbicide Use for Maintenance of WCGS Structures Herbicides were used on transmission corridors, gravel areas, railroad easements, and various land areas associated with WCGS. Application rates followed label instructions. All herbicides used were registered by the Kansas Department of Agriculture when purchased. No environmental impacts from herbicide treatment of WCGS facilities were identified. A summary of herbicide application is provided below.

The transmission lines associated with WCGS include the Wolf Creek-Rose Hill and a small portion of the Wolf Creek-Benton line. Mechanical tree removal was completed on the Wolf Creek-Rose Hill corridor, with limited herbicide use.

Stump treatment herbicide included Pathway (EPA Reg. No. 62719-31).

In areas where bare-ground control was desired, herbicides mixed per label instruction of either Karmex DF (EPA Reg. No 352-508), Oust (EPA Reg. No.

352-401), or Sahara DG (EPA Reg. No. 241-372) were used. Roundup Ultra (EPA Reg. No 524-475), or comparable substitutes, were also used for problem weed areas. These herbicides were used on various gravel areas, including the 5

switchyard, protected area boundary, meteorological tower, storage tank berms, railroad beds, and storage yards.

Nuisance tree and brush growth was controlled with, Tordon RTU (EPA Reg. No.

62719-31), Remedy (EPA Reg. No. 62719-70), Weed Pro 2,4-D (EPA Reg. No.

10107-31), and Roundup Ultra. Areas treated included the dam, railroad easements, and selected grassland areas around the cooling lake.

Four plants listed as noxious weeds by the Kansas Department of Agriculture were controlled on WCGS lands. These weire serecia lespedeza, musk thistle, Johnson grass, and field bindweed. Serecia lespedeza was treated with Pasturegard (EPA Reg. No. 62719-477), Remedy, and Weed Pro 2, 4-D. Musk thistle was controlled with mechanical means. Johnson grass was controlled with Roundup Ultra while field bindweed was controlled through normal farming practices by the tenants of the agricultural leases.

2.2.4 Waterfowl Disease Contingency Plan and Monitoring A waterfowl disease contingency plan was maintained to provide guidance for station biologists in the event of suspected or actual disease outbreaks. The contingency plan lists appropriate federal and state wildlife agency contacts to be made by WCNOC in the event of such problems. During routine environmental monitoring and surveillance activities taking place over this reporting period, no waterfowl mortality attributable to disease pathogens was identified.

2.2.5 Fog Monitoring Program [EPP Subsection 4.2.1]

Visibility monitoring was initiated in December, 1983, and continued through 1987. The purpose of this study was to evaluate the impact of waste heat dissipation from CCL on fog occurrence along U. S. 75 near New Strawn, Kansas. The program was required through one year of commercial operation that started in September, 1985. Upon conclusion of 1987 data collection, sufficient information was available to evaluate cooling lake fogging, and all commitments relevant to fog monitoring had been satisfied. The fog monitoring study concluded that operation of WCGS did not appreciably increase fogging incidents from that measured before operation.

During 2007, there were no reports of fogging incidents in the vicinity of nearby U. S. 75 from individuals or local agencies responsible for traffic safety. Periodic fogging caused by the cooling lake did occur during the winter months of 2007, but was restricted to the plant site. No mitigation actions or further monitoring were warranted.

2.2.6 Wildlife Monitoring Program [EPP Subsection 4.2.2]

A wildlife monitoring program was initiated in 1982 to monitor and assess waterfowl, waterbird, and bald eagle usage of CCL. This program included transmission line collision surveys to assess collision mortality and determine potential mitigation needs. This wildlife monitoring program was to continue for at least two years following WCGS start-up (FES-OLS Section 5.5.1.2), which occurred in September 1985. Transmission line surveys were conducted from 1983 through 1988. Monitoring of lake use by waterfowl, waterbirds, and bald eagles continued through 1996. By then, sufficient data had been collected to determine waterfowl, waterbird, and bald eagle usage ,of CCL. Consequently, 6

the scope of the wildlife monitoring program was reduced. The current program consists of reviewing CCL waterfowl and bald eagle survey data collected by the Kansas Department of Wildlife and Parks (KDWP). If review of the KDWP's data indicates that usage has increased from that previously documented, then additional monitoring may be initiated if it is determined to be warranted. Any such additional monitoring may include collision mortality monitoring.

Review of waterfowl and bald eagle monitoring data from the KDWP indicate that no significant usage increases occurred during the 2007-2008 monitoring period.

No disease outbreaks or widespread crop depredation attributable to waterfowl use of CCL were observed during the 2007-2008 monitoring period. No changes to the wildlife monitoring program were warranted.

2.2.7 Land Management Program [EPP Subsection 4.2.3]

Land management activities on all company-owned lands except within the 453 hectare (1120 acre) WCGS exclusion area were designed to achieve balances between agricultural production and conservation values. An annual management plan addressed needs and accepted techniques for land maintenance, soil conservation, and wildlife management. These included the repair or construction of soil conservation structures, wetland areas, and permanent vegetative covers. An environmental education area was improved and maintained as part of the land management program. A summary of the land management activities appears in Section 4.1 of this report. The land management program continued to balance agriculture production and conservation values.

3.0 ENVIRONMENTAL PROTECTION PLAN REPORTING REQUIREMENTS 3.1 PLANT DESIGN OR OPERATION CHANGES [EPP Section 3.1]

Proposed plant design and operational changes which have the potential to affect the environment must receive an environmental evaluation prior to implementation. In 2007, one such change that received an evaluation involved the removal of an existing acid storage tank facility, and the construction of a new building to house lake water chemical treatment systems. The building was within areas previously disturbed by WCGS construction, and was not required to achieve compliance with other environmental regulations. Cultural resource impacts were not likely, and did not occur. Environmental impacts were not expected, nor were any identified during completion of the building.

3.2 NON-ROUTINE ENVIRONMENTAL REPORTS 3.2.1 Submitted Non-routine Reports There were no environmental reports involving significant non-routine impacts submitted to the NRC during 2007.

3.2.2 Unusual or Important Environmental Event Evaluations No unusual or important environmental events reportable according to specifications in the EPP were identified during 2007.

3.3 ENVIRONMENTAL NCNCOMPLIANCES [EPP Subsection 5.4.1]

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Potential environmental noncompliances or noteworthy events were documented and evaluated in accordance with WCNOC's Corrective Action Program. Events evaluated during 2007 included improvements in hazardous waste reduction efforts and transporting procedures. All the documented enhancements and reviews were determined not to be reportable pursuant to EPP criteria.

4.0

SUMMARY

OF ENVIRONMENTAL INVESTIGATIONS AT WOLF CREEK GENERATING STATION 4.1 2007 LAND MANAGEMENT ACTIVITIES The EPP requires a land management program that will implement conservation and wildlife management techniques to attempt to balance production and conservation values (EPP Section 4.2.3). The land management program at WCGS satisfied this requirement. Specific program objectives were to:

a. conserve or improve both agricultural and natural resources,

b. foster good relations with local agricultural and natural resource communities,

c. satisfy licensing requirements,

d. improve the appearance of the company's lands, and

e. enhance, for educational purposes, the natural resources of the Environmental Education Area (EEA).

These objectives were attained as explained below.

Grasslands at WCGS consisted of areas leased for grazing and hay production and other areas maintained for regulatory compliance, soil conservation, and wildlife. Areas adjacent to CCL, approximately 1440 acres, exceeded the 500 acre buffer zone of "naturally occurring biotic communities" referenced in the EPP. Approximately 1,982 acres of native rangeland were leased for grazing and haying in 2007. Leases specified rotation programs, season lengths, maximum grazing rates, and hay cutting dates.

Fire has always been an integral part of the prairie and was used to control woody brush invasion, control less desirable cool-season grasses or weeds, increase wildlife value, and to increase prairie vigor and production. Prescribed burning was completed on approximately 600 acres during 2007.

Management of cropland reduced soil erosion, maintained rent income, and increased wildlife benefits. Conservation farming, terracing, and wildlife strip management continued to help achieve the objectives. A total of 1282 acres of cropland was leased in 2007. Consistent with past years, the cropland lease contracts specified that common conservation practices be followed. On fields with appropriate terraces to follow, contour farming was required. Double-cropping, i.e., producing two crops on the same acreage during the same season, was generally prohibited because this practice usually increases soil loss. Fall tillage of crop residues was prohibited except for certain instances, such as tillage necessary for fall planting of wheat, plowing of terraces and deep tillage practices to improve productivity.

Activities at the EEA were designed to improve wildlife habitat and increase the public's chances to view a greater variety of wildlife. Tree and shrub planting, wildlife food plots, controlled burning, and trail improvements were a few of the techniques employed. The EEA has drawn a large amount of attention and continues to be well suited for educational purposes.

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4.2. 2007 ZEBRA MUSSEL MONITORING ACTIVITIES Zebra mussels were not observed during 2007 monitoring of the Neosho River and CCL. In the event zebra mussel become established in CCL, concerns at Wolf Creek Generating Station (WCGS) include cooling system plugging, increased chemical treatment needs, and changes to the environment of CCL, such as increased vegetation growth and associated impacts to the fishery and cooling water use. Regionally, the potential for zebra mussels to be introduced into CCL and the Neosho River system has increased due to recent establishment in area lakes; Anglers launching boats on CCL have reported being on several lakes known to have zebra mussels, thus represent potential transport vectors.

Monitoring was completed to provide early detection of zebra mussel in the vicinity of WCGS. Efforts included substrate and shoreline searches of the Neosho River upstream of John Redmond Reservoir and immediately downstream in the vicinity of the Makeup-water Screen House, where water is pumped from the Neosho River to CCL.

Settlement monitors were placed and substrate scrapes were conducted at plant structures on the Neosho River and CCL. Inspections of fishing boats were also continued through 2007.

4.3 2007 FISHERY MONITORING ACTIVITIES This report presents the results of fishery monitoring activities on CCL. Data document long-term trends and demonstrate that the fishery has functioned as desired through 2007. Fish predation pressure on the gizzard shad population continued to prevent excessive shad impingement problems at the circulating water intake.

Except possibly for walleye, public angling on the lake did not impact the fishery's function of supporting plant operations. The catch and release philosophy promoted when the lake was opened for the public has been compatible with gizzard shad control objectives. There were no changes to fish regulations recommended to the Kansas Department of Wildlife Parks for 2007. Stocking of wipers is recommended to replace aging fish.

Walleye catch frequency continued to decline in 2007, which brings into question if the population can sustain current angler harvest. Harvest impacts were detectable with gill net efforts, and body conditions improved. Water temperatures may be limiting maximum walleye growth and their effectiveness at controlling gizzard shad numbers.

Consequently, further data analysis and possible creel changes in the future may be warranted.

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