ML20038C566
| ML20038C566 | |
| Person / Time | |
|---|---|
| Site: | Clinch River |
| Issue date: | 11/27/1981 |
| From: | Copeland R ENERGY, DEPT. OF, CLINCH RIVER BREEDER REACTOR PLANT |
| To: | Check P Office of Nuclear Reactor Regulation |
| References | |
| PS:81:342, NUDOCS 8112110231 | |
| Download: ML20038C566 (63) | |
Text
_
3 4
Department of Energy Clinch River Brec&r Reactor Plant Project OfikN 4
RO. Box U Oak Ridge, Tennessee 37830 I
Docket 'a. 50-537 November 27, 1981 p W E
Mr. Paul S. Check, Director Ogg1 ,
CRBR Program Office 6- 4 0 -3 C'
Office of Nuclear Reactor Regulation ~
8/A
- g'ttaa, U. S. Nuclear Regulatory Commission Washingto% DC 20555 D 7
Dear Mr. Check:
[
RESPONSES TO NRC QUESTIONS
, This letter continues the responses to the questions provided to the -
CRBRP Project in your letter of October 26. Our letter dated Novem-ber 13,1981, provided fifteen responses to the thirty-one requests for additional information. In that letter we provided a schedule for furnishing the remaining material. This letter provides responses to
] the following questions:
230.lR, 230.2R, 230.3R 290.1R 320.9R
< 460.lR, 460.2R It is expected that the remaining responses will continue to be supplied i on the schedule provided in our letter of November 13.
If you have any questions, please contact Mr. Henry Piper of my staff.
Sincerely, 5 '
R d Copel d PS:81:342 A ting ssist DirectM for ublic Safety
Enclosure:
As stated cc: Service List Standard Distribution DNp Licensing Distribution Si j 8112110231 811127
- PDR ADOCK 05000537 l
- A PDR
ITEM 230.1R The geology and seismology literature search needs to be updated. The latest reference in the bibliography is 1974.
Considerable rusearch in geology and seismology has been done since that time (i.e., Appalachian COCORP Plan; recent studies of the Giles County Earthquake by Bollinger prestnted at the Earthquakes and Earthquake Engineering meeting in September, 1981 in Knoxville, Tenn.; TVA Appalachian Study; Studies related to the Charleston, S.C. 1886 earthquake; site investigations at TVA and other nuclear projects in the region; studies of other recent and historic Appalachian earthquakes; etc.)
Summary or Resconser ,
The geologic and seismological literature search is being updated to include the years 1974-1981. The various categories into which the recent literature has been presented are identified. A discussion of'the findings of the seismological literature search is presented.
The most significant findings since 1974 has been the Giles County earthquake study by Professor G. A. Boltinger which tentatively identified a northeast striking basement f ault with ascribed maximum magnitude of Ms 7.0. Using the procedure outlined in the report to estimate the design intensities at distances away f rom Giles County, the CRBRP site intensity is estimated to be MMVI. Since CRBRP is designed to MM VIII, the current design is more conservative than that arrived by using Bollinger's Report. Independent studies by TVA reached similar conclusions for the Watts Bar plant located in the same tectonic province. There is no evidence for other similar structures within the Southern Appalachian geologic province.
No other new knowledge exists which would imply the inadequacy of the site design maximum intensity (VIII).
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Response
The geological and seismologic literature search is being updated to include the years 1974-1981. The geologic literature search was designed to include references to recent work performed in the-general site area pertaining to possible recent faulting, location of faults not previously recognized in the area, new l interpretations of age of thrust faulting, and physical properties of the Paleozoic rock units.
The seismologic literature search was designed to include references to recent work related to understanding the causes and ,
distribution of earthquakes in the eastern United States, recent results of seismic monitoring in specific areas, and recent work defining the tectonic setting of the eastern United States.
The literature search consisted of six data bases (National Technical Information Service, Georef, Geoarchive, Dissertation Abstracts, Government Printing Office, and Engineering Index), a review of reference lists from available recent site-related publications, and a telephone survey of geoscientists familiar with recent work done in the area. The search generated approximately 300 references, of which fewer than 200 appear to be directly applicable to the geologic or seismologic conditions in the area.
i The geologic publications generally fall into three categories:
- 1) the statigraphy of the Paleozoic rock units; 2) analyses of the COCORP seismic data; and 3) developments in the interpretation of the origin of the Southern Appalachians, including originc of and mechanisms for thrust faulting in the Valley and Ridge province. The seismologic literature falls generally into five categories: 1) intraplate tectonics; 2) l Cretaceous and Cenozoic faulting; 3) Southern Appalachien tectonics; 4) research conducted in specific areas of the eastern United States; and 5) speculations concerning the causes Q230.1R-2 t __. _ . _ _ _ . __ _ . _ . _ - _ _ - _ _ _ _ _ _ _ _ _ _ _ _ - - _ _ _ _ _ _ _
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. .i.
of eastern United States seismicity. Based on the literature
! reviewed to date, it is concluded that tha specific design assumptions related to the derivation of the site seismicity for the CRBRP plant will not be impacted. A brief summary with bibliography is included below.
Intraclate Tectonism Recent studies concerning the occurrence of earthquakes in the eastern United States suggest that seismicity is the result of i
- reactivation of pre-existing zones of weakness by the present stress field. A thorough discussion of this subject is given in (1). The orientation and origin of the modern stress field in the central and eastern United States is discussed in (1) and (2).
Paultina Recent work has been published pertaining to Cretaceous and Cenozoic f aulting along the eastern United States continental margin (3,4,5,6,7,8). It has been proposed that northeast trending reverse faults of Cretaceous and Cenozoic age are responsible for seismicity along the eastern seaboard (9,10,11).
Southern Accalachian Tectonic Structure Recent geologic and geophysical evidence is interpreted to indicate that much of the crystalline Southern Appalachians consist of allochthonous slabs thrust from the southeast along a decollement separating the crystalline rocks from essentially flat-lying sedimentary atrata(12,13) ,
The Bouguer gravity field of the region has been studied by several investigators. Decomposition of the gravity field by wavelength filtering reveals a gradient extending from Maine to Alabama. It has been proposed (14) that seismicity in the
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crystalline Appalachians is concentrated along this gradient and notably along its transverse offsets.
Regional magnetic and gravity data were correlated with seismicity, satellite photo-imagery and related geologic data (15). Results suggest that the Precambrian crust underlying the folded Southern Appalachians has a complex structural pattern
, which can be divided into a series of distinct tectonic subdivisions.
Specific Areas of the Eastern United States Charleston. South Carolina:
During the past decade, much research has been directed toward identification of the structure that generated the 1886 Charleston earthquake. In 1977, the U.S. Geological Survey published Professional Paper 1028, a collection of papers which summarizes preliminary findings. A second professional paper devoted to the Charleston area is currently being prepared.
Focal depths for recent seismicity in the Charleston area suggest that the 1886 shock occurred in the upper crust (16) . Drilling in the Summerville area has shown that the Coastal Plain sediments are underlain by a basalt layer of Jurassic age (17) , which overlies red-bed deposits of earlier Mesozoic age. Further evidence of the graben-like deeper structure of the area comes from seismic refraction (18,19) magnetic (20), and gravity data (21). Seismic reflection profiles show a reverse fault in the Summerville area (Cooke fault) with possible northeast strike, wnich moved during Cenozoic time (5). As yet, the relationship of .
this fault to seismicity is unclear (16) . Fault plane solu-tions for the Charleston seismicity show northwest-striking or sub-horizontal nodal planes (22,16) .
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i Recently, it has been proposed that movement along the Appalachian decollement inferred from COCORP reflection data (12,
- 13) may be the cause of the 1886 Charleston event (23) . However, whether or not the decollement extends under the Charleston area is as yet controversial (16) ,
In their update on information concerning the Charleston area requested for the St. Lucie SER(24), the U. S.G. S. summarizes the current understanding of the area as follows:
"The problem regarding identification of specific tectonic structures capable of generating large earthquakes in the east is far from resolution. Local structures near Charleston are incompletely known at present and the larger structural element, the decollement, is as yet hypothetical. However, the concentra-tion of seismicity in the Charleston earthquake epicenter both before and af ter the August 31, 1886, event and the lack of post Miocene faulting in the Coastal Plain or any evidence for localizing large earthquakes indicate that the likelihood of a Charleston-sized event in other parts of the Coastal Plain and Piedmont is very low. Consequently, earthquakes similar to the 1886 event should be considered as having the potential to occur in the vicinity of Charleston and seismic engineering parameters should be determined on that basis."
Giles County. Vircinia Important new information about seismicity in the Giles County, Virginia, area has recently been obtained from monitoring by a dense seismograph network (25, 26, 27). The seismic moni-toring has revealed that focal depths in the Giles County area range
~
from 5 km to almost 25 km. Furthermore, the epicenters in. the area reveal a northeast lineation in the seismicity pattern.
Focal depths indicate that activity is below the Paleozoic section, within the Precambrian basement rocks and middle crust.
The strike of the epicenter trend of N37oE departs from the Q230.lR-5
general trend of the Paleezoic Valley and Ridge axes in the area.
This suggests that the seismicity is caused by a fault zone ,
associated with an earlier trend.
l Recently, an estimate has been made of the maximum possible earthquake for the Giles County area by Prof. G. A. Bollinger
- (28). This represents the most significant finding since 1974 related to regional seismology. From the range of possible fault plane areas, values ranging from Ms 6.0 to Ms 7.0 were determined. In addition, hypothetical isoscismal maps I representing the intensity effects of the maximum sarthquake were prepared (28).
Attenuation from the Giles County area to the CRBRP site of the maximum hypothetical size earthquake would result in an event less than the design Intensity VIII and, consequently, will not impact the site seismicity.
I TVA addressed this question in a recent response to NRC on -
! evaluating the impact of the Bollinger hypothesis on the seismic design of the Watts Bar plant located in the same tectonic province and similar conclusions were reached.
Sneculations concernina the Cause of Eastern United States Seismicity The causes of eastern United States earthquakes are not yet
{ understood. It has been noted that intraplate seismicity shows an association with igneous intrusive rocks (l), and hypotheses concerning the role of intrusive bodies in concentrating stress
! have been proposed (29, 30). It has been argued that both i
seismicity and igneous intrusives are fundamentally related to rif t zones, areas of pre-existing crustal weakness which may be
! reactivated by the modern stress field (1,16) .
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i Two recently proposed hypotheses attempt to explain the origin of seismicity in the Piedmont and Coastal Plain provinces of the eastern United States. Under one hypothesis (23) , the 1886 Charleston event is attributed to gravitational backslip along the. Southern Appalachian decollement. Another hypothesis (9,10,
- 11) . proposes that seismicity along the Atlantic Coast is related to reactivated reverse movement on scattered northeast trending
, faults formed during Mesozoic rif ting. However, these hypotheses are not viable in the folded Southern Appalachian area. Recent data from Giles County, Virginia, suggest that a reactivated, northeast trending, high angle, dip slip fault formed in early Paleozoic time may be responsible for the seismicity in that area _
(25).
The list of geological references is not included but is in progress and should be complete in about one month. These references will be forwarded to NRC when they become available.
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f SEISMOLOGY REFERENCES
- 1) Sykes, L. R., Intraplate seismicity, reactivation of pre-i existing zones of weakness, alkaline magmatism, and other tectonism postdating continental fragmentation: Reviews of Geophysics and Space Phyaics, v.16, p. 621-66 8,197 8.
2)' zoback, M. L. , and Zoback, M. D. , State of stress in the
-conterminous United States: Journal of Geophysical Research, v. 85, p. 6113-6156.
- 3) Mixon, R. B. , and Newell, W. L., Stafford f ault system:
structures documenting Cretaceous and Tertiary deformation along the Fall Line in northeastern Virginia: Geology, v.
5, p. 437-440, 1977.
- 4) Prowell, D. C. , and O' Conner, B. J. , Belair fault zone:
evidence of Tertiary fault displacement in eastern Georgia:, ,
Geology, v. 6, p. 6 82-684,197 8.
- 5) Behrendt, J. C., Hamilton, R. M. , Ackermann, H. D. , and Henry, V. J. , Cenozoic f aulting in the vicinity of the Charleston, South Carolina, earthquake zone: Geology, v. 9, no. 3, 1981.
- 6) York, J. E., and Oliver, J. B. , Cretaceous and Cenozoic f aulting in eastern North America, Geological Society of America Bulletin, v. 87, p. 1105-1114, 1976.
7} Mixon, R. B. , and Newell, W. L. , The f aulted Coastal Plain margin at Fredericksburg, Virginia: R. B. Mixon and W. L.
Hewell, U.S. Geological Survey, Reston, Virginia, Guidebook for Tenth Annual Virginia Geology Field Conference, October
, 13-14, 197 8. 50 p. , 197 8.
- 8) Howard, K. A., and others, Preliminary map of young faults in the United States as a guide to possible f ault activity:
U.S. Geological Survey Miscellaneous Field Studies Map MF-916, scale 1:5,000,000,1978.
- 9) Wentworth, C. M., and Mergner-Keefer, Marcia, Atlantic-coast reverse fault domain: probable source of east-coast seismicity: Geological Society of America Abstracts with Programs, v. 12, p. 547, 1980.
- 10) Wentworth, C. M., and Mergner-Keefer, Marcia, Regenerate faults of small Cenozoic offset as probable earthquake sources in the Southeastern United States: U.S. Geological Survey Open-File Report 81-356, 1981.
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- 11) Wentworth, C. M. , and Mergner-Keef er, Marcia, Reverse fault-
- ing along the eastern seaboard cad the potential for large earthquakes in Proc. Earthquakes and earthquake engineering
- eastern United States, Sept. 14-16, 1981, Knoxville, Ten-nessee.
- 12) Cook, F. A. , Albaugh, D. S., Brown, L. D., Kaufman, S.,
Oliver, J. E., and Hatcher, R. D., Jr., Thin-skinned tec-i tonics in the crystalline southern Appalachians; COCORP seismic-reflection profiling of the Blue Ridge and Piedmont:
Geology, v. 7. , p. 563-567, 197 9.
- 13) Harris, L. D., and Bayer, K. C., Sequential developments of the Appalachian orogen above a master decollement--A hypo-thesis: Geology, v. 7, p. 56 8-572,1979.
- 14) Kane, M. F., Simpson, R. W., and Osberg, P. H., New gravity evidence of crust-mantle structure and seismicity in the Appalachians (abs.): Transactions of the American Geophy-sical Union, v. 62, no.17, p. 402,1981.
- 15) Seay, W. M., and Hopkins, R. A., Southern Appalachian tectonic study: ja Proc. Earthquakes and earthquake engi-neering - the eastern United States, Sept. 14-16, 1981, Knoxville, Tennessee.
- 16) Hamilton, R. M. , Geologic Origin of Eastern U.S. Seismicity, in Proc. Earthquakes and earthquake engineering - the easterri' United States, Sept. 14-16, 1981, Knoxville, Tennessee.
- 17) Gohn, G. S., Higgins, B. B. , Smith, C. C. , and Owens, J. P. ,
Lithostratigraphy of the deep corehole (Clubhouse Cross-roads Corehole 1) near Charleston, South Carolina: U.S.
Geological Survey Professional Paper 1028-E, p. 59-70, 1977.
l 18) Talwani, P., A preliminary shallow crustal model between Columbia and Charleston, South Carolina, determined from quarry blast monitoring and other geophysical data: U.S.
Geological Survey Professional Paper 1028-M, p.177-187, 1977. ,
- 19) Ackermann, H. D., Exploring the Charleston, South Carolina area with seismic refraction - a preliminary study: U.S.
Geological Survey Professional Paper 1028-L, p.167-175, 1977.
- 20) Phillips, J. D., Daniels, D. L., Zietz, I., and Popenoe, P.,
Geophysical studies of the Charlestora, South Caroina area -
onshore aeromagnetic map: U.S. Geological Survey Miscellaneous Field Studies Map MF-1022-A, 1978.
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- 21) Long, L. T., and Champion, J. W., Jr., Bouguer gravity map of the Summerville-Charleston, South Carolina, epicentral zone and tectonic implications: U.S. Geological Survey Professional Paper 1028-K, p.151-166,1977.
- 22) Tarr, A. C., Recent seismicity near Charleston, Scuth Carolina, and its relationship to the August 31, 1886 earthquake, in Rankin, D. W. (ed.) Studies Related to the Charleston, South Carolina carrbquake of 1886--a preliminary report: U.S. Geological Survey Professional Paper 1028, p.
43-57, 1977.
- 23) Armbruster, J. G. , and Seeber, L. , Intraplate seismicity in the northeastern United States and the Appalachian detachment: la Proc. Earthquakes and earthquake engi-neering - the eastern United States, Sept. 14-16, 1981, Knoxville, Tennessee, i
- 24) Official Communication, U.S. Department of Interior, Geo-logical Survey, to Dr. Robert E. Jackson, Division of Engi-neering, U.S. Nuclear Regulatory Commission, December 30, 1980.
- 25) Bollinger, G. A., and Wheeler, R. L. , The Giles County, Virginia, seismogenic zone: Geological Society of America Abstracts with Program, v.12, no. 7, p. 389,1980.
. 26) Bollinger, G. A., and Wheeler, R. L. , The Giles County, Virginia, seismic network - Monitoring results, 1978-1980:
Earthquake Notes, v. Si, p. 14, 1980.
- 27) Bollinger, G. A., and Sibol, M. S., Pault source models for Virginia earthquakes: Earthquake Notes, v. 52, p. 61, 1981.
i
- 28) Bollinger, G. A. , The Giles County, Virginia seismic zone -
configuration and hazard assessment: in Proc. Earthquakes and earthquake engineering - the eastern United States, Sept. 14-16, 1981, Knoxville, Tennessee.
- 29) Kane, M. F., Correlation of major eastern earthquake centers with mafic-ultramafic masses: U.S. Geological Survey Pro-fessional Paper 1028-0, p. 199-204, 1977.
- 30) McKeown, F. A. , Hypothesis: many earthquakes in the central and southeastern United States are causally related to mafic
, intrusive bodies: U.S. Geological Survey Journal of Research v. 6, p. 41-50,1978.
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ITEM 230.2R i
Based on the site investigation' data presented in the PSAR, the upper siltstone horizon of Unit A, within which the structure foundations are to be placeG, is relatively devoid of solution features below foundation grade. However, it is "not obvious that the underlying limestone unit of the Chickamauga Group, Unit A and the much deeper Knox group do not contain significant cavities. Determine the maximum size cavity, based on regional studies of karst features in these rock units, that could exist beneath the plant without being detected by the investigations performed. Evaluate the capability of the foundation rock unit (Unit A, upper silt-stone) to bridge such cavities.
Summary of Resconse
- 1) The potential for cavities and other karst features within the Unit A Limestone of the Chickamauga Group below the proposed base excavation level for the Nuclear Island is considered minimal. It is believed that existing boring data, results of the test grouting program, and the planned bedrock verification program as addressed in the PSAR will be sufficient to confirm the homogeneity of the Unit A Limestone. This verification program is scheduled to commence shortly and results will be provided upon completion.
- 2) Research studies on the regional geology have shown that weathering in the Knox has been encountered to depths up to 200 feet. Geotechnical investigations at the site have indicated a depth of weathering in the Knox not exceeding 100 feet. Consequently, with a minimum depth of cover above the Knox of 450 feet, subsidence problems will not occur beneath the CRBRP site.
Q230.2R-1
Response
l EVALUATION OF THE POTENTIAL CAVITIES IN THE KNOX FORMATION The size, shape, frequency, and extent at depth of karstic cavities depend upon 1) the extent of the weathering zone, 2) the presence or absence of impervious strata, and 3) local geologic structures (f aults) . In general, solution cavities, both ancient and recent, may be open, or completely filled with clastic material, or may be water-filled conduits. Ancient, or paleo-karst cavities, are typically filled with recemented material and are as competent as the host rock around them.
Weathering within the Oak Ridge reservation is usually limited to i the upper 100 feet of the surface. The weathering of rock is most severe in the local limestone and dolomite units, leaving karstic terrain with clay and chert residuum for soil. Below the weathering zone, the rock is generally jointed, but sound,.with joint strength increasing and open joint frequency sacreasing with depth.
The development of karst features at the surf ace and at depth in the rocks of the Knox Group is well documented. Sinkholes and cavities are very frequent and have created many problems in the foundation of structures throughout the entire region. The Knox Group has been described as a massive dolomite with a paleokarst upper unit. This upper unit reflects an ancient karstic erosional surface which was subsequently beveled and covered by the Chickamauga Group. According to local experts and available references, this paleokarst unit is now a very competent rock.
The ancient solution cavities, joints and caves, were fi1I~ed with residuum and recemented to the point that it is now difficult to detect the paleokarst unit from the overlying and underlying carbonate units. These paleokarst features are well documented in the zinc district of northeastern Tennessee where they are -
always filled and cemented and do not represent a hazard.
! . Q230.2R-2
The only areas of karst with active solutioning exist within zones of active weathering, at or close to the contact between the Knox and the Chickamauga groups, and at depths ranging from 0 to 200 feet. Tho size of the cavities varies from enlarged joints to several tens, and occasionally hundreds of feet in span, Geotechnical investigation at the site indicated a maximum depth of weathering not exceeding 100 feet.
To summarize our own experience and available data the following f can be concluded: 1) Frequent and large open cavities (up to several hundred feet) occur within the Knox Group. These solution features are exclusively developed at shallow depth (no' deeper than 200 feet) and in relation to the zone of weathering.
- 2) Many cavities appear to be located at or close to the unconformity existing between the Knox and Chickamauga Groups.
When this unconformity is at depth beneath the zone of weathering the karst features are ancient and filled, and the filling material is recemented.
[ In conclusion, it would appear Ebat subsidence is not a problem below the CRBRP site and in view of the shallow depth of weathering, it would not be necessary to conduct hypothetical analytical studies to determine the maximum size cavity related ,
to depth and strength properties of overlying strata.
I i
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BIBLIOGRAPHY Franklin, and others, 1981. Foundation Considerations in Siting of Nuclear Facilities in Karst Terrains and Other Areas Susceptible to Ground Collapse NUREG/CR-2062.
GSK, 1950. Application of Geology to Engineering Practices GSA Law Engineering Testing Company,1974, Clinch River Breeder Reactor Plant, Preliminary Safety Analysis Report, Section 2.5.
Proj ect Management Corporation,1975. Clinch River Breeder Reactor Plant, Environmental Report, Section 2.4.
O l
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ITEM 230.3R i
Furnish a map and summary discussion of the relationship beneath the Pleistocene / Pliocene high terrace deposits and geologic structures at the site, particularly the shear zone encountered in core borings.
RAFponse In response to this question we are providing Figure 2.5-5 from the PSAR which is the site geologic map.
Although terrace deposit studies have been used as a tool to locate and date faulting and other geologic structures, they were not used for this purpose during the CRBRP licensing investigation. The age of geologic structures at and near the 4
site (Copper Creek, White Oak Mountain, and other faults as well as the shear zone within the Chickamauga Group) were determined by other lines of evidence. At the time of the licensing study, no other such terrace study has been carried out in eastern Tennessee within the Valley and Ridge geologic province. Since dhat time, one such study had been identified. This study was perf ormed by P. A. Delcourt of the University of Tennessee (Knoxville) along the Little Tennessee River from Chilhowee Dam to the Tellico Dam (approximately 10 miles southeast of the CRBRP site). Delcourt* has mapped nine different terrace deposits along the river and has radiocarbon age dates on the three youngest terraces.
- Delcourt, P. A. ,1981, Personal Communication to Law Engi-neering Testing Company.
Q23 0.3 R-1
The distribution and state of presentation of the terrace deposits along the Clinch River is not documented in the geologic literature; therefore, no assessment can be made concerning their i relationship to the terrace deposits mapped by Delcourt along the Little Tennessee River or directly to the structures identified at the site. However, during the geologic mapping at the site, the general distribution of terrace material was plotted (PSAR Figure 2.5-5). Terrace deposits form a veneer over portions of ,
the site. This material is high-level alluvium deposited by the Clinch River when stream levels were much higher than at the present. Such deposits are generally regarded as Pleistocene to Pliocene in age. The terrace deposits consist mainly of orange and red silty clay with thin layers of rounded quartz, chart, and quartzite gravel. A limited number of borings have penetrated the terrace deposits extending to depths ranging from 8 to 19.5 feet below the ground surface.
For a study to be conducted on the terrace deposits, it would first be necessary to establish whether sufficient material exists in the near vicinity of the CRBRP site to permit developing a correlation with geologic structures at the site
- including the shear zone encountered in the Chickamauga Group.
Detailed surf ace mapping and surveying in conjunction with subsurf ace mapping (trenching with a backhoe) would be required.
Correlation of individual terraces would have to be done by age dating (radiocarbon or palynology), comparison of lithologic composition of the terraces, or possibly by heavy mineral analyses of terrace material. Plotting the distribution of the terraces on longitudinal profiles would allow for detection of offsets in the terraces on the regional scale, while smaller scale offsets would have to be recognized in the field, generally from the trench study.
It is considered that a program of work of the nature described above is not warranted for the CRBRP site because, as outlined in the PSAR, other lines of evidence were sufficient to conclude Q230.3R-2
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that all structural elements including the shear zone are ancient l and are not considered capable.
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I* !' !* Amend. 59 Dec. 1980 2.5-94
I ITEM 290.1R Provide a succinct summary and discussion in table form, by ER section, of differences between currently projected station design and environmental effects (including those that would degrade, and those that would enhance environ-mental conditions) and the effects discussed in the environ-mental reports submitted in 1975, Amendments 1 through 7.
l Summary of Response:
The changes to CRBRP design which have occurred since 1977 and the expected environmental effects of these changes are summarized succinctly by ER section in the attached table. Most of the ER sections have already been modified to reflect the design changes and their environmental effects. The sections that are yet to be modified in future amendments to the ER are highlighted in boxes in the table and for your convenience are listed below.,
ER Summary of Change (s) to be Section Reflected in Future ER Amendments 1.0 Heterogeneous core replaces homogeneous core arrangement. This section will also address the supplement to the LMFBR Program Final Environmental Statement.
2.2 Inclusion of the most recent demographic data available.
3.5 Numerous refinements in the plant systems designs that result in changes to the effluent from the plant.
4.1.2.1 Construction water consumption estimates have been increased.
Q290.lR-1
r-5.2 Changes to radiological source term and pathway analysis.
5.3 Changes to the radiological source term, pathway and population data.
5.4.3 Instead of being directly discharged to the Clinch River via catch basins, storm water collected by the roof and yard drains is sent via the storm drainage system to the impounding ponds for settlement and ultimate discharge to the river.
5.8.1 Increased total acreage commitment.
6.1.4.2 Inclusion of most recent demographic data available.
Chapter 7 X/Q's based on a complete on-site meteorology data base have been provided; changes to the plant design and analysis methods which result in modified source terms require updated dose calculations.
Chapter 8 Revised construction manpower requirements, 1980 census and other recent demographics data.
Chapter 9 A supplement to the LMFBR Program Final Environmental Statement will be issued; responses will be provided for recent NRC questions.
Q290.1R-2
CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 1 ER SECTION REVISED ITEN DESCRIPTION OF CHANGE ENVIRONMENTAL EFFECT l
1.0 TO BE PROVIDED Heterogeneous core replaces homogeneous core arrangement (See Section 3.8) . This Section will also address the supplement to the LMFBR Program Final Environmental Statement.
2.1 2.1-1 thru 2.1-10 Plant Construction site acreage increased. Plant See Section 4.0 arrangements updated. Five impounding ponds were identified and located on Figure 2.1-3.
2.2 TO BE PROVIDED Evaluation of demographic changes in process. Changes will be provided in a future amendment.
2.3 No change.
2.4 2.4-15 thru Geology Changed to provide data for 24 additional Environmentally inconsequential.
2.4.22 boreholes, taken from September 1976 to June 1977.
2.5 t
2.5.1 2.5.1 thru 2.5-10 River Updated river levels, flows, temperatures, Environmentally inconsequential.
etc.
2.5.2 2.5.2.1 No change.
2.5.2.2 No change. ,
i 2.5.2.3 No change.
2.5.2.4 2.5-18 Ground- Established piezometric gradient. Environmentally inconsequential. .
water 2.5.2.5 No change. ,
2.5.2.6 No change.
2.5.2.7 No change.
2.6 2.6-1 thru Neteor- Updated to include data accumulated Environmentally inconsequential.
2.6-99 ology using permanent meteorological tower.
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_ _ _ . _ _ -.- __ ___ _ _ _ _ _ _ _ - _ _______m_ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ -_ _ _ _
CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 1 ER J SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFECT I mm, . __ _ _ ,_ _ _.___. _
1.0 TO BE PROVIDED Heterogeneous core replaces homogeneous core arrangement (See Section 3.8) . This Section will also address the supplement to the LMFBR Program Final Environmental Statement.
3.1 2.1-1 thra 2.1-10 Plant Construction site acreage increased. Plant see Section 4.0 arrangements updated. Five impoundi.79 pnds were identified and located on Figure 2.1-3.
2.3 TO BE PROVIDED Evaluation of demographic changes in process. Changes will be provided in a future amendment.
3.3 No change.
3.4 2.4-15 thru Geology Changed to provide data for 24 additional Environmentally inconsequential.
2.4.22 boreholes, taken from September 1976 to June 1977.
3.5 2.5.1 thru 2.5-10 River Updated Ilver levels, flows, tempe r atures, Environmentally inconsequential.
3.5.1 etc.
3.5.2 3.5.2.1 No change.
2.5.2.2 No change.
3.5.2.3 Fo change.
3.5.2.4 2.5-18 Ground- Established piesometric gradient. Environmentally inconsequential, water 2.5.2.5 No change. l 1
2.5.2.6 No change.
2.5.2.7 No change.
2.6 2.6-1 thru Meteor- Updated to include data accumulated Environmentally inconsequential, j J
2.6-99 ology using permanent meteorological tower.
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 2
, ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONNENTAL EFFECT l I
2.7 ,
2.7.1 1
i 2.7.1.1 2.7-la Forest Incorporates ORNL forest management No change in estimated environmental Nanage- activities from 1976 through 1980. effects for CRBRP. Nitigation measures for Southern Pine Beetle and Pitch Canker I infestations.
I
! 2.7.1.2 No change.
I 2.7.1.3 2.7-7 thru Flora Update vegetation inventory reporting. Environmentally inconsequential.
, 2.7-9 .
2.7-24, -37 Flora Correct pine designation. Environmentally inconsequential.
2.7-381, -38m Flora Revise category designation f rom Environmentally inconsequential.
" threatened" to " rare" to reflect current terminology.
2.7.1.4 2.7-380 thru Fauna Update wildlife occurrence data. Environmentally inconsequential.
2.7-38t l 2.7-38ee Insects Update reporting concerning insect Environmentally inconsequential.
pests.
2.7-38ff Fauna Revised to include possibility of Occurrence on CRBRP site not confirmed. l eastern cougar occurrence on Oak Also, cougar home range is sufficiently ,
Ridge Reservation. extensive to absorb effect or CRBRP installation. Environmentally inconsequential.
2.7-3899 ' Avifauna Adds mention of osprey nast occurrence Osprey nesting at CRBRP site has not been i
at Watts Bar Lake. observed. Environmentally inconsequential.
2.7.1.5 ' No change..
)
2.7.1.6 2.7-38tt Avifauna Update classification of American Occurrence of nesting at site has not
,! osprey.' g been observed.
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, c 2.7.1.7 2.7-3 8ww . Surveys Report on 1980 reconnaissance Environmentally inconsequential.
j - $ surveys. .
j ,
' ii I 1 2.7.2 f
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N ;
I 2.7.2.1 T l '
No change. -s I ., n 2.7.2.2 No change.
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 3
. y
, , s.
v_, g SECTION REVISED ITEN ,
DESCRIPTION GP CHANGE ENVIRONNENTAL EFFECT ,
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2.7.2.3 No change. ,
2.7.2.4' 2.7-87g Fish Report of occurrences of.the blue Occurrence not reported near Site.
sucker in Hatts Bar Lake. Blue Environmentally inconsequential, sucker is identified as a threatened species.
2.7.2.5 2.7-87h Aquatic Report on 1980 reconnaissance surveys. Stocking activities have resulted in
-871 Surveys reported increases in gametish. No change in estimated environmental
- effects due to CRBRP. .
2.8 2.8-1 thru Back- Complete update reflecting latest Data better characterizes the actual 2.8-109 ground ORNL, TVA and similar organization site and the surrounding areas.
Radia- studies and scientific papers. Environmentally inconsequential.
tion s
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 4 ER KECTION REVISED ITEN DESCRIPTION OF CHANGE ENVIROWNENTAL EFFSCT 3.0 3.1 3.1-1 Esternal A five foot high animal fence was added Preclude small animals from plant site and Appear- at a distance of 33 feet from the and restrict them to more natural ance security fence. environs. Environmentally inconsequential.
i i 3.1.1 3.1-2 Plant Gatehouse, circulating water pump house Environmentally inconsequential.
I Bldg. & and fire protection pump house were i Facili- identified. The switch yard relay house ,
ties was added.
The configuration and location of the Environmentally inconsegnential. ,
emergency cooling tower structure were revi sed.
3.1.2 3.1.4 Plant Five foot high animal fence added. Environmentally inconsequential. l Site
! 3.1.3 3.1-4 Other The size of paved parking area was Environmentally incoceequential. ,
Facili- reduced for accommodation of 155 cars '
ties instead of 250 before.
3.2 3.2.1 No change.
3.2.2 3.2-3 Core Replaced homogeneous core with hetero- Net change judged to be insignificant.
geneous arrangementresulting in eliminating one fuel enrichment zone (was 2 now 1), reducing .,
number of fuel assemblies from 198 to 156, reducing number of radial blanket assen-blies from 150 to 132, adding 82 inner blanket assemblies, and increasing Pu en-richment in fuel assemblies from 18.7-32%
to 32-334.
3.2.3 No change.
3.3 3.3.1 3.3-1 overall Average annual consumptive water use Environmentally inconsequential.
Plant figures were revised to be consistent with those in Tables 3.3-1, 3.3-2 and 3.3-3.
3.3.2 3.3-2 Cooling Flowrate to cooling tower from condenser Slight increare la plume si-se will not Tower increased from 209,200 gym to 212,200 gpa. produce ,signficant environmental impact. .
,3.3.3 3.3-2 Process Added makeup water treatment system Environmentally inconsequential.
Water . .
Treatment
. System
^
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 5 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFECT l 3.3.4 3.3-3 Waste All process waste water including floor Results in higher quality of water g Water drains, go to Waste Water Disposal Systsa discharged.
Disposal instead of being routed to either cooling System tower basin or neutralisation and settling facilities.
3.3.5 3.3-3 Radwaste Updated description. See Section 3.5.
Systems 3.3.6 3.3-4 Potable Potable water is supplied by DOE's Bear Environmentally inconsequential.
Water Creek Road Filtration Plant instead of Sources the Nake-up Water Treatment System.
Tcble 3.3-5 Plant Increase in plant make-up flow rate Environmentally inconsequential.
3.3-1 Flow- from 5835 gym to 6145 gym.
rates During Increase in cooling tower evaporation Environmentally inconsequential.
Maximum rate from 3475 gpa to 3623 gpe.
Power Increase.in cooling. tower drift rate from 105 gpa to 106 gpe.
Environmentally inconsequential. f 1
Increase in cooling tower blowdown rate Environmentally inconsequential. l from 2210 gpa to 2306 gym. -
p ,
Decrease in Process Waste Treatment Environmentally inconsequential.
flow rate from 125 gpa to 110 gpe. .
Waste Water Disposal System Flowrate designed at 100 gpe.
Environmentally inconsequential. [
Increase in plant discharge rate tros Environmentally inconsequential.
2,251 gpe to 2,411 gpe.
Increase in total consumptive use of Environmentally inconsequential, river water from 3,584 gym to 3,733 gpe.
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i CRBRP ENVIROMNECTAL REPORT REVIEW PAGE 6 '
1 ER I
SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFECT l
l Table 3.3-6 Plant Increase in Plant Make-up Flowrate Environmentally inconsequential, g
' 3-2 ,, Flow- from 2,361 gpa to 2,527 gpe.
rates 1 During Increase in cooling tower evaporation Environmentally inconsequential.
- Minimum rate from 1,390 gym to 1,450 gym.
Power
, Increase in cooling tower blowdown rate Environmentally inconsequential, j from 884 gym to 925 gym.
l Decrease in process water treatment flow- Environmentally inconsequential.
i rate from 125 gpa to 110 gym.
waste Water Disposal System flowrate Environmentally inconsequential.
- designed at 100 gps.
Increase in plant discharge rate from EnvironmentC ly inconsequential.
i 925 gym to 1,030 gpe.
I Increase in total consumption use of Environmentally inconsequential.
river water from 1,436 gpa to 1,496 gym.
Trble 3.3-7 Plant Increase in plant makeup flowrate from Environmentally inconsequential.
3.3-3 Flow- 625 gym to 715 gym.
rates During Increase in cooling tower blowdown Environmentally inconsequential.
Tem- flowrate from 221 gym to 231 gym.
porary shutdown Increase in cooling tower evaporation Environmentally inconsequential, rate from 348 gpa to 363 gym.
Decrease in process water treatment Environmentally inconsequential.
flowrate from 125 gpa to 110 gym. ,
t Waste Water Disposal System flowrate Environmentally inconsequential.
designed as 100 gym.
Increase in plant discharge flowrate Environmentally l'nconsequential.
from 262 gym to 336 gym.
Increase in total rnneurotive use Environmentally inco.wsquential.
of river water fs9e 363 gp to 378.
Table 3.3-8 Plant Seasonal Flowrates in Table have been Environmentally inconsequential. ,,
3.3-4 Water adjusted to reflect present design.
Usage Seasonal .
Variation O nae e
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, 12.?.RP ENVIRONPENTAL REPORT REVIEW PAGE 7 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE IXIIRONNENTAL EFFECT l
, 3.4.1 3.4-1 Woling Updated Makeup water addition to 6035 gpa. Environmentally inconsequential.
- hver ,
i 3.4.2 3.4-3 River Design flowrate for river water pumps Environmentally inconsequential.
j Water decreased from 10,000 gpm each to 9,000 gpm Pumps each.
3.4.3 No change.
T;ble 3.4-5 Heat Heat rejected from a cooling tower Environmentally inconsequential.
3.4-1 Dissipa- increased f rom 2.172 x 109 B1U/HR to tion 2.256 x 109 BTU /HR.
- Design Parameters <
& Conditions Trblo 3.4-6 Component Updated Design Parameters. Environmentally inconsequential.
3.4-2 Descrip-tions T;ble 3.4-8 Cooling Average monthly cooling tower blow- Environmentally inconsequential.
3.4-4 Tower down temperatures increased slightly.
Blowdown Temperature 3.5 (ALL CHANGES TO SECTION 3.5 THAT ARE DESCRIBED BELOW WILL BE PROVIDED IN A FUTURE AMENDMENT TO THE ER.)
3 . 5 .1 ~ No change.
3.5.1.1 No change.
a e' 3.5.1.2 3.5-3 Filter A filter deleted from the liquid Environmentally inconsequential.
radwaste system.
3.5.2 I 3.5.2.1 3.5-7 Noble The 39At and 41Ar produced by direct The additional Argon from thic source is Gases activation of 38Ar and 40Ar is now negligible and the environmental impact included in the radioactive source terms is considered insignificant.
used for design work. ,
3.5.2.2 3.5-8 Treat- Design has been changed so that 85g from The site boundary beta skin dose is ment RAPS is no longer bottled but is pr5 cessed increased by approximately a factor of 2, and thru CAPS and released to H6V. buttheyKtential for accidental exposure Release due to atorage and shippin is System removed. fhenetchangeinenvfronmental effects is judged to be insignificant. .
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CR3RP ENVIRONMENTAL REPORT REVIEW PAGE 8 i
1 T
!- SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL BFFECT l
}
Previously all leakages of cover gas or The site boundary beta and gamma doses are recycled cover gas were processed through increased; a slightly adverse effect. The ,
CAPS. Now most of the cells containing beta dose increased W approximately 1.5, 2 components which could leak cover gas vent gamma dose by approximately 3.
I to B&V.
l 3.5.2.3 3.5-9, 10 Tritium The tritium removal unit has been Environmentally inconsequential.
4 Removal redesigned.
j System .;
- 3.5.2.4 3.5-11 Head The reactor cover gas leakage rate The site boundary beta and gn=== doses 1 Seals was reduced from 0.012 SCC per minute are decreased; a slightly favorable to 0.0044 SCC per minute. environmental effect.
{
! The diffusion of Tritium through The additional radioactivity contributed piping walla into PRTS and auxiliary by the small maount of Tritium diffusing J
Na cells has been added to design through piping walls is insignificant i
t assumptions. Any significant amount compared to the radioactivity contained of Tritium'has been included in the in the cover gas which is assumed to leak j
- current radiclogical source terms. Into cells at the rate of I cc/ min. The
- impact is judged insignificant.
i
- 3.5.2.5 3.5-12 Release Ventilation exhaust rates at radiological Higher exhaust rates could potentially l
Points release points have been revised. Examples have more environmental impact due to
- are the release point in the SGB Inter- shorter hold-up of radionuclides.
mediate Bay which increased from 50,000 However, the doses resulting from SCFM to 64,000 SCFM and the exhaust point plant releases remain well below on top of the RCB which increased f rom guideline limits.
' 415,000 SCFM to 418,000 SCFM.
This change in temperature range will Ventilation exhaust temperature ranges have no impact. Density variations which l at radiological release points have could release more or less radioactive ,
increased. An example is a release material are accounted f or in the pre-point in the RSB that did have a range coding changes in exhaust rates. j of 65or to 120oF and now ranges from i 550F to 1400F.
The CAPS Reactor Service Building R&V No environmental impact for normal Exhaust has been deleted. CAPS now release. Improved protection against exhausts through the RSB exhaust with release of above normal radioactivity '
. safety-related exhaust radiation monitors. from the plant due to off-normal con-ditions - a slightly favorable ef fect.
RAPS process components have been moved No environmental impact for normal f rom the RSB to the RCB. operation. Improved protection 4 against release of radioactivity from d
the plant following RAPS accidents - . ,
a slightly favorable ef fect.
E e, 3
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j CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 9 ta
- j SECTION REVIS ED ITEN DESCRIPTION OF CHANGE ENVIRONNENTAL EFFECT 3.5.2.6 3.5-13, -14 RAPS Revises gaseous release data based on No environmental impact f or normal J
relocated RAPS, updated burnup and release operation. Improved protection i point datra, and most recent meterology, against release of radioactivity from i the plant following RAPS accidents -
l a slightly favorable ef fecto i
! 3.5.2.7 3.5-14, -15 Balance Turbine generator building ventilation Environmentally inconsequential.
l of Plant exhaust location change f rom elevation 905'6" to 878'0", release rate decrease from 17,500 cfm to 8,000 cfe, exhaust i flow velocity increase from 585 feet / min.
- with a temperature range of 85 to 120or l to 900 feet / min with a temperature range 1
from 550F to 1200?.
Plant Service Building ventilation exhaust 4 location changed f rom elevation 830'0" to 831'2".
Number of relaase points decreased from 2 to 1.
3.5.3 3.5-15 Solid Solid radwaste m ulpment is now Environaentally inconsequential.
(3.5.3.1 Radwaste is now identified as including 3.5.3.2) System a cement filling station, a decanting station, Bquip- a concentrated waste collection tank, a drumming ment station, a filter handling machine and a compactor. (See also Tables 3.5-10 and 3.5-11).
3.5.3.3 3.5-15 Noncom- There will be a total of 82 (instead Environmentally inconsequential.
patible of 202) 55 gallon drums per year used to store Solids the low activity, non-compactible solids of Rad- af ter treatment at tho salid radwaste waste system.
System 3.5.3.4 3.5-16 Radio- There are nov 2 drums of waste metallic Environmentally incensequential.
active sodium per year with an activity level Sodium of 20 C1/ drum instead of 6 drums / year with an activity level of 1.5 C1/ drum stored and/or processed on site.
3.5.3.5 3.5-17 Sodium The disposal of sodium bearing waste, Environmentally inconsequential.
Bearing which was not previously identified, Solids has been selected. Ma currently licensed off-site disposal facility will accept sodium bearing wastes, therefore, for off-site disposal of these wastes, the sodium will be removed. Where sodium removal is not practical, the waste will be stored on-site.
' ~
Activ- Individual primary cold trap contained Environmentally inconsequential.
ity actlyity of Tritium increased from 8.7 x 10J Ci to 1.85 x 5 Ci and activity of fission and corrosion products increase from 1 x 103 C1 to 1.41 x 105 C1. The
CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 10 ER ENVIRONMENTAL EFFBCT ,!
SECTION REVIS ED ITEM DESCRIPTION OF CHANGE contained activity will not be removed or released f rom the cold traps. The g EVST cold trap contained activity increased from 6.7 x 10J C1. The Tritium activity ,
increased from 150 C1 to 180 C1.
3.5-18, IALL Some of the assumptions that Table 3.5-1 Environmentally inconsequential.
Table 3.5-1 -19 System had been based upon have changed:
(
I 1
- 1) Intermediate activity concentration i
for the first rinse computed assuming 104 (instead of 404) of plated out activity and 100% of sodium activity adhering to the process components is i dissolved in 100,000 (instead to 37,000) f gallons of water per year. l
- 2) Processed components involve an average annual volume of 3,200 (instead of 14,700) {
gallons.
3.5-20 IALL Some of the assumptions that Table 3.5-2 Environmentally inconsequential.
Table 3.5-2 thru -22 System had been based upon have changed: #
- 1) Iodine Dr=104 included. Monitoring tank volume decreased f rom 2,500 gallons to 2,400 gallons.
- 2) Iodine DF=104 included. .
Table 3.5-23, IALL Some of the assumptions that Table 3.5-3 Environmentally inconsequential.
3.5-3 -24 Systen had been based upon have changed: ;
lant Activity Liquid Maatt Anan=ntions:
Intermediate Activity Liquid Magig Asanentions:
- 1. Liquid waste discharged to the common plant discharger (instead of the coolant water blowdown str eam) . Iodine DF-104 and Tritium DP=1 included. .
Expected values in teble have been changed to Environmentally inconsequential.
Table 3.5-31 3.5-10 Weight, reflect current design.
Volume and Total estimated volume of solid radwaste
- Activity generated decreased f rom 3,094 f 3t /yr to *- _
of Solid 2,865 f t3/yr.
Radwaste
CRBRP ENVEtONMENTAL REPO1T REVIEW PAGE 11 ER
, SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFECT
, Total estimated weight of solid radwaste i generated decreased from 2.6 x 105 lbs/yr.
j to 1.9 m 103 lbs/yr.
l Total estimated activity of solid radwaste
- generated decreased from 6.6 x 104 C1/yr. to
- 3.2 x 103 C1/yr.
i Tcble 3.5-32 Expected Expected containers per year of solidified Environmentally inconsequential, i 3.5-11 Solid liquid radwaste decreased from 170 to 135.
Radwaste Ship- Expected containers per year of filters and ments resins decreased from 120 to 30.
per year l Figure 3.5-33 Basic Inlets of collecting tanks now include Environmentally inconsequential.
Plow 3.5-1 filters.
Design
} Figure 3.5-37 Basic Completely revised to reflect vendor Environmentally inconsequential.
1 3.5-5 Flow design.
4 Design :.
j 3.6 No change.
3.6.1 No change.
! 3.6.2 3.6-3 Sodium Capability of injecting sodium hypo- Environmentally inconsequential.
l Bypo- chlorite into cooling tower basin,
- chlorite on a continuous or intermittent basis.
l Injection i
j 3.6.3 3.6-4 Demin- Delete limits on demineralizer chemicals. Environmentally inconsequential.
i eralizer 4
3.6.4 3.6-5 Sewage Chlorine limits set to meet NPDES permit Environmentally inconsequential. '
Disposal limits.
, Figure 3.6-7 Incorporate changes as described in text. Environmentally inconsequential.
- 3.6-1 3.7 No change.
3.7.1 3.7-1 Sanitary Addition of pretreatment and extended Environmentally inconsequential.
Sewage aeration of activated sludge. Compares System ef fluent concentrations to NPDES permit limits (Table 3.7-1) .
3.7.2 No change.
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 12 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONNE1TAL EFFBCT 3.8 3.8.1.1 3.8-1, -2 Core Replaced homogeneous core arrangement with Decreases the haavy metal commitment Design heterogeneous core arrangement resulting (U or U + Pu) in the axial blankets in reducing the number of fuel assemblies and core from 5.4 NT to 4.2 NT and from 198 to 156, increasing the Pu enrich- from 6.5 NT to 5.2 NT, respectively.
ment from 18.7 to 324 fissile to 33.2% Environmentally inconsequential.
total.
Deleted option to noe natural uranium Environmentally inconsequential.
as alternate material to depleted uranium as feed material for fuel pellets.
Revised refueling scheme from replacing Average yearly shipments of fresh approximately one-third annually to fuel would therefore increase from batch replacement of all the fuel and about 33 to 42. Environmentally inner blanket acsemblies at two year inconsequential.
intervals with mid-interval replacement of 6 inner blankets with fresh fuel g assemblies.
- 3.8.1.2 3.8-2 Core Replaced homogeneous core arrangement Increases the have metal (U) commitment
- Design with heterogeneola core arrangement from 16.4 NT to 21.6 NT. Environmentally resulting in increasing the total number inconsequential.
of blanket assemblies from 150 (radial)
! to 214 (82 inner and 132 radial) . ,
I Revised dimensional parameters of blanket Environmentally inconsequential.
rods (outside diameter desceased from 0.520 in, to 0.506 in.) and assenoly weight increased (from 525 lbs. to 536 lbs.).
Revised refueling scheme from annual hverage yearly shipments fresh blanket i refueling to batch refueling at two- assemblies will therefore increase from .
year intervals. 13 to 35. Environmentally i inconsequential.
1 Figure
, 3.8.1 3.8-10 Reactor Revised to ahow heterogeneous core layout. Environmentally inconsequential. i Figure 3.8.2 3.8-11 Fuel Dimensions removed. Environmentally inconsequential.
l 3.8.2.1 3.8-3, -4 Core Replaced homogeneous core arrangement Shipping schedule for speat fuel increases Design with heterogeneous core arrangement from 8 to 12 shipments per year to one and revised refueling scheme from annual shipment per week. Change judged to refueling to betch refueling at two year to be slightly adverse.
Intervals resulting in increasing the average
.. number of fuel assemblies discharged yearly from 66 to 81, decreasing the fuel assembly burnup from .
l
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CR2RP ENVIRONMENTAL REPORT REVIEW PAGE 13 ER l SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONIERTAL BFFBCT 200,000 MWD / Ton average to 80,000 NWD/ Ton average, and the peak burnup to 110,000 i "
MWD / Ton, decreasing the average burnup in the axial blankets f rom 4,000 MWD / Ton to 2,200 MWD / Ton, and reducing the amount of bred fissile Pu from I kg/assy. to 0.3 to 0.4 kg/assy.
Revised weight and dimensions of spent fuel Environmentally inconsequential.
shipping cask.
3.8.2.2 3.8-4, -5 Core Replaced homogeneous core arrangement with Increases the number of spent blanket Design heterogeneous core arrangement and revised assembly shipments f rom 3 to 6-7 per year. ,.
refueling scheme from annual to batch Change judged to be slightly adverse, resulting in increasing the number of blanket assemblies discharged f rom the plant per year f rom 25 to 70, increasing the burnup per assesbly from 5,700 MWD / Ton
. o 8,000 MWD / Ton, increasing the average and M ak heat generation from 1 kw average (radlal) to 2.6 kw (inner) and 1.6 kw (radial) and f rom 7 kw peak (radial) to 19.7 kw (inner) and 12 kw (radial).
3.8.3 3.8.3.1 3.8-5 thru Core Replacement of homogeneous core arrangement Change judged to be slightly favce-ble.
3.8-7 Design with heterogeneous core arrangement results in reducing the number of primary control assemblies from 15 to 9 and . increasing the number of secondary con ~.tol assemblies from 4 to 6. .
If lifetime considerations permit, control Change judged to be slightly favorable, rods could remain in the reactor for two cycles, also the driveline lifetime has been increased from 10 to 15 years.
Revised configuration of radial shield Environmentally inconsequential.
assembly from stacked hexagonal plates to closely packed rods in a her duct and .
decreased assembly weight from 750 to 360 lbs.
Because of the change to the heterogeneous This greatly reduces the number of ship-core arrangement the lifetime of the first ments of irradiated shield assemblies, row of shield assemblies has increased Change judged to be favorable. _
from 3 to 10-to-15 years, part of the second row lifetime has increased from 6-to-12 to 10-to-25 years, and the third . .
mf
CRIRP ENVIRC~ MENTAL REPORT REVIEW PAGE 14 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFBCT ,l and fourth rows are not espected to require ,
replacement during plant lifetime. The ,
number of first row assemblies has been reduced from 72 to 54.
3.8.3.2 3.8-8 RAPS Design has been changed so that 85K r is no The site boundary beta skin dose is longee bottled but is processed through increased by approximately a factor of 2, CAPS and released to H&V. but the M tential for accidental exposure due to 85K r storage and shipping is removed the net change in environmental effects is judged to be insignificant.
3.8-8, -9 Primary The tritium levels were updated f rom 1.8 Material will not be released so the Cold x 104 Ci to 1.85 x 105 Ci and the fission changes are judges to be environ-Trap products and corrosion products increased mentally inconsequential. .
from 1 x 103 C1 to 1.41 x 105 C1. ,
Cold traps are to be stored on site since ,
no currently licensed disposal site will j accept sodium-bearing wastes. .
i 3.9 ;
I 3.9-1 No change. ;
3.9-2 No change.
3.9-3 No change.
3.9-4 3.9-4 Flora Update to account for ORNL forest No change in environmental effects due management activities since 1976. to CRBRP.
(Table 3.9-1) _
3.9-5 No change, d
3.9-6 No change.
3.9-7 No change.
3.9-8 No change.
3.9-9 No change.
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CRGRP ENVIRONNENTAL REPORT REVIEW PAGE 15 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONIENTAL BFFBCT 4.1 4.1-1, -2 Site Deletion of borrow area, increase of Environmentally inconsequential.
Prep. site temporary acreage to 260 acres and from 195 acres required for plant Plant construction, 37 acres inside security Cons- barrier, quarry increase from 25 acres to truc- 45 acres, provide crusher fecility at tion quarry (Table 4.1-1, Figure $.1-1) .
4.1.1 4.1.1.1 4.1-2 Clearing Choice to use open burning during site Change judged to have a slight negative clearing. environmental effect.
4.1-3, -4 Quarry Excavation depths increased. Change judged to be slightly favorable as Eliminate consideration of borrow pit. quarry location will be preferable to borrow pit's. Onsite availability of material will reduce offsite hauling requicements.
4.1.1.2 No change.
4.1.1.3 4.1-5 Access Nodify Barge Unionding Facility. Change judged to be slightly favorable.
Facility Redesipp minimises dredging.
4.1.1.4 No change.
4.1.1.5 No change.
4.1.1.6 4.1-7 thru Site Update terrestrial ecological effects Change judged to have slightly negative 4.1-8b Extent of site clearing and construction. environmental effect due to increased (Table 4.2-1 and Table 4.1-3) aread.
Include ORNL forest management plan. No change to estimated environmental effects due to CRBRP.
Updates impacts on wildlife. No change to estimated envirc>sental
. effects due to CRBRP.
4.1.1.7 4.1-11 Human Eliminates borrow area. Reduces construc- Change judged to be slightly favorables Activ- tion activ.ities near cemetery. borrow area was in vicinity of Jensley i family cemetery.
l 4.1.1.8 4.1-12 Niti- Updates redressability -Environmentally loconsequential. .
gation in light of design changes (i.e, choice of quarry rather Chan borrow pit, addition of demolition fill area, etc.)
i
CRBRP ENVIRONMEUfAL REPORT REVIEW PAGE 16 ER GECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFECT 4.1.2 4.1.2.1 4.1-13 water Construction water consumption estimates Environmentally inconsequential.
Use have been increased and vill be provided Additional water consumption still is only by ER amendment in the near future. a very small fraction of the available Clinch River flow.
4.1.2.2 No change.
4.1.2.3 4.1-15 Barge Relocation and redesign will reduce Change judged to be slightly favorable.
Unload- dredging.
ing Facility 4.2 No change.
Table 4.2-9 Trans- Transmission corridor acreages updated. Environmentally inconsequential.
4.2-1 mission Corridor 4.3 4.3-1 thru Re- Updated to account for revised affected Net effect of all changes is judged to be
- 4. 3-3 sources areas, and addition of quarry. environmentally inconsequential.
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CRBRP ENVIRONNENTAL REPORT REVIEW PAGE 17 ER SECTION REVISED ITEN DESCRIPTION OF CHANGE ENVIRONMENTAL BFFECT 5.1 No change.'
5.1.1 No change.
5.1.1.1 5.1-3, -4 Cooling Updated to reflect effects of cooling Change demonstrates that latest design System system redesign. Produces effects that are enveloped by previous (approved) designs.
5.1.1.2 5.1-5 "No Updated plume configurations to reflect Change falls within effects that are Flow" effects described in 5.1.1.1. enveloped by previous approvals.
Plumes 5.1.2 5.1-6, -7 Thermal Revised to include reference to NPDES NPDES requirements exert positive controls Dis- Permit requirements on ef fluent quality. i.
Charge S tandar ds 5.1.3 No channe.
5.1.3.1 5.1-12 thru Fish Discusses recent studies of fish Environmentally inconsequential.
Habitat (striped bass and sauger) behavior in the Clinch River. Includes habitats, af gration and spawning.
5.1.3.2 No change.
5.1.3.3 No change.
5.1.3.4 -
No change.
5.1.3.5 No change.
5.1.4 No change.
5.1.5 5.1-22 Con- Update condenser water design flow rate. Environmentally inconsequential.
denser Also updates Clinch River flow data.
Entrainment 5.1.6 No change.
5.1.7 No change, l
5.1.8 No change.
l 5.2 Radio- This section is being reviewed to determine logical the signficance of changes to radiological source Biota term and pathway to warrant re-analysis.
5.3 Radio- This section is being reviewed to determine the logical significance of changes to the readiologcal source .
Impact term, pathway and population data to warrant
,- r e-analysis. <
3
CRBRP ENVIRONMENTAL REPORT REVIEW PAGE IS ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVImosIENTAL EFFECT ,)
5.4 5.4-1 Effects Editorial change to clarify and explain Environmentally inconsequential, of Chem- that an acid feed system is provided. g ical & Its use would adjust pH for control of Biocide corrosion and scaling, and to assure that Dis- the blowdown is in compliance with the charges the Draf t NPDES permit limits.
Defined the limits of chlorine Environmentally inconsequential.
concentration.
5.4.1 5.4-2 Waste Adde discussion of changes to waste Environmentally inconsequential.
Water water disposal system that have been Disposal previously described.
5.4.1.1 5.4-4a coolant Total volume discharged increased ' lightly Environmentally inconsequential.
System with no changes in chemical concentrations.
Discharge 5.4.1.2 5.4-5 thru Discharge Changed per cent differential between Environmentally inconsequential.
5.4-8 Plume ambient and blowdown concentrations.
Striped Described bass response to chemical Environmentally inconsequential.
Bass plume.
Water Identifies elements not meeting drinking Environmentally. inconsequential.
Quality water standards at 64 isopleth during periods of extended no flow.
Included consideration of the more Environmentally inconsequential.
stringent of state or federal requirements.
(Tables 5.4-1, 5.4-2 and 5.4-5).
5.4.2 5.4-12 , Effects Includes discussion of trihalomethanes Environmentally inconsequential.
of Bio- (THM's) (Table 5.4-1) cide Dis-charges 5.4.3 5.4-12a Storm Instead of being directly discharged The incorpration of Obis system Watet to the Clinch River via catch basins, provides f urther assurance that the storm water collected by the roof and yard final effluent discharged to the drains is sent via the storm drainage river via the impounding pound is system to the impounding pounds for within applicable effluent standards, settlement and ultimate discharge to the The effect is judged to be environ-river. Change will be provided in a mentally favorable. _
future amendment. '
5.4.4 No change. .
5,. 4,. 5 No change.
5.5 No change.
i CRORP ENVIRONMENTAL a' EPORT REVIEW PAGE 19 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIROWNENTAL EFFBCT 5.5.1 5.5-1, -2 Effects Editorial change to clarify that a package Environmentally inconsequential.
from San- treatment plant will be used during the itary construction period. A slow sand filter Wastes unit will be installed following the CRBRP construction period to form a part of the permanent plant for the normal operation of the plant.
Third paragraph deleted since the des- Environmentally inconsequential.
cription of the treatment. plant is given 3 in Section 3.7.
Treated effluent discharges will be Environmentally inconsequential.
processed to meet the Draf t NPCES permit limits instead of "all State and Federal discharge regulations".
Discharges from cooling tower blowdown were Environmentally inconsequential.
revised to be consistent with Table 3.3-4.
5.5.2 No change.
5.6 No change.
5.7 No change.
5.8 No change.
5.8.1 5.8-1 Plant Total acreage committed updated. Environmentally inconsequential.
Site Changec will be provided in a future amendment. l 5.8.2 5.8-2 Water Water consumption opdated to reflect Environmentally inconsequential.
Resources latest estimates.
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CRBRP ENVIRONMENTAL REPORi REVIEW PAGE 20 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL RFFBCT .l 5.8.3 5.8-2 thru Core Replaced homogeneous core arrangement change decreases the heavy metal 5.8-4 Design with heterogeneous core arrangement commitments in the fuel (U + Pu) resulting in reducing the number of from 6.5 MT to 5.2 NT, reduces the fuel enrichment zones from 2 to 1, stainless steel commitments in the .
increasing the Pu enrichment in the fuel from 26.3 MT to 20.7 MT. The fuel from 18.7-to-27.1 to 33.24, reducing heavy metal commitment in the blanket the number of fuel assemblies from 198 to went from 21.7 MT (radial & axial) to 156. This change also increases the 25.8 NT (inner, radial & axial), and number of blanket assemblies from 150 increases the stainless steel commitment (radial) to.214 (inner and radial). In the blankets from 17.3 MT to 27.6 MT.
Change judged to be environmentally inconsequential.
Revised Pu isotopic composition to be Environmentally inconsequential.
similar to FFTP grade instead of char-I acteristic of LWR discharge.
Revised refueling scheme from annual This results in increasing the total to batch which results in increasing the heavy metal commitments based on a once total number of fuel assemblies, required through fuel cycles from 20 NT Pu to 27 NT during plant life, from 2,300 to 2,427; Pu, from 210 MT U to 336 NT U and increasing the totti number of blanket from 410 MT stainless assemblies from 850 to 2,142. steel to 600 NT. If reprocessing is assumed, then the total net heavy metal commitment of uranium decreases from 17.7 MT to 14.3 MT and the not gain of bred plutonium decreases from 2.9 NT to 2.3 MT.
Change judged to be slightly adverse.
5.8.4 No changes.
5.9 5.9-1 Plant Permanent plant acreage is increased. Environmentally inconsequential.
Site
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 21 ER SECTION REVISED ITEM DESCRIPTION CP CHANGE ENVIRONMENTAL EFFECT 6.0 No change.
6.1 6.1-1 Pre-con- Changed to indicate that program was Environmentally inconsequential.
struc- conducted.
tion .
Monitoring Program 6.1.1 6.1.1.1 6.1-1 thru Base- Completion of baseline aquatic monitoring Environmentally inconsequential.
6.1-24 line program description (results of baseline Monitor- program reported in Section 2.7, (Amendment ing VIII).
Program (41.1.2 6.1-25 thru Pre-con- Provides a summary description and con- Environmentally inconsequential.
6.1-28e struc- clusions of the pre-construction aquatic Change provides data base for deter-tion environmental monitoring. mination of environmental ef fects due Aquatic to construction as monitored by the construction environmental monitor 1~ng program.
6.1.2 6.1-29 Ground- UNated to incorporate reference to Environmentally inconsequential.
water de pre-construction monitoring program (1976-1977). ,
6.1.2.1 6.1-29, -29a Pr e-con- Provides summary conclusions of the Environmentally inconsequential.
struc- pre-construction groundwater quality Changes provides data base f or the tion monitoring program. construction monitoring Program.
Ground-water
. Quality 6.1.3 6.1-30 thru Meteor- Updates meteoroloaical descriMion to Environmentally inconsecuential.
6.1-33 ology incorporate description, inattunentation Permanent metebrological and data acquisition system for the on- facilities will be used during plant site permanent meteorological monitoring construction and operation for on-site stations. meteorological analyses.
Environmentally inconsequential.
Deletes description of on-site temporary meteorological monitoring station.
6.1.4 .
6.1.4.1 6.1-35 th r u Geology Provides update of site geology invest- Environmentally inconsequential.
6.1-37 igation (results provided in Section 2.4).
'6.1.4.2 6.1-38, -39 Land Use. Evaluation of demographic changes in Environmentally inconsequential.
& Demo- process.
graphic
- Surveys
~ .
- L CRIRP ENVIRONMENTAL REPORT REVIEW yAag 22 0
ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIROllNENTAL EFFBCT d 6.1.4.3 6.1-39 thru Terres- Provides update discussion of baseline Environmentally inconsequential.
8 6.1-41 trial terrestrial monitoring program. (Con-Ecology clusions provided in Section 2.7).
4 Construc- Provides reference to on-site construction Environmentally inconsequential.
6.1-42 tion environmental monitoring program.
Monitoring 8 6.1.5 No change.
6.1-42a thru Precon- Provides complete description and results Change is judged to be slightly favorabia, a 6.1.5.1 i
1 6.1-43 struc- of pre-construction radiological (river Provides basis for improved determination of radiological disturbance av monitored tion water, groundwater, sediment) monitoring 8 Radio- program. during the construction radiological l
logical monitoring program.
Monitoring i 6.2 No change, t
6.2.1 6.2.1.1 6.2-1 Chru Gaseous Updates plant gaseous effluent monitoring Change is judged to be slightly favorable.
f 6.2-2b Efflu- locations (32 locations from 13 locations. System will provide ents 1 - steam generator building - continuous monitors at those locations 9 - reactor containment buildings which could conceivably undergo e1 '
3 - reactor service building significant increase in detectable 1 - radwaste area Icvels 1 - plant service building - periodic sampling for areas as t ,
l 1
14 - turbine generator buildings necessary. l 3 - steam generator buildings 6
PSB Liquid effluents go to liquid radwaste Environmentally inconsequential.
Liquid system for reprocessing. 4 Effluents i
6.2.1.2 6.2-3 thru Pre-or Provides current (atmospheric, terrestrial, Environmentally inconsequential. I 6.2-10 peration- aquatic groundwater) radiological monitoring al Rad- programs for the pre-operational and iologi- operational phases, e cal Monitoring t
6.2.2 No change.
6.2.3 No change, e
6.2.4 No change.
- ~6.2.5 No change. , e, Environmentally inconsequential.
- 6 .'3 6.3-1 Other Deletes monitoring stations at TVA's Monitor- Kingston steam plant and Bull Run ing steam plant. 8-ProMrams
CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 23 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL BFFBCT 7.1 ( ALL CHANGES 'IO SECTION 7.1 '1 HAT ARE DESCRIBED BELOW WILL BE PFDVIDED IN A FUTURE AMENDMENT 'ID 'tHE ER) 7.1.1 7.1.1.1 7.1-1 Meteor- Meterology contained in Section 2.6 as ology provided by Amendment IX will be used in the computations.
4 7.1.1.2 7.1-2 th r u Method- Methodology changes, as appropriate, will be 7.1-6 ology provided. -
7.1.1.3 No change.
7.1.2 ,
7.1.2.1 No change.
7.1.2.2 7.1-8, -9 Eteam The amount of tritiated water released The combined effect of these changes is to Drum to the environment is 353,000 lbs. Instead increase the site boundary whole body dose valve of 450,000 lbs. from 1.77 ares to 5.50 mreas both are
( 2.1)
- envronmentally inconsequential.
The tritium concentration has increased from .25 x 10-6 C1/g to .62 x 10-6 C1/g.
Conden- The tritium concentration in the Condensate The short-term downstream tritium concen-sate Storage Tank increased to .62 x 10-6 Ci/g tration in the Clinch River increased from Storage from .25 x 10-6 C1/g. C1/g to 2.89 x 10-12 cgfg Ik8x10-12 Tank al er de postulated leaks both are !
Leak environmentally inconsequential.
(2.2) 7.1.2.3 7.1-10 thru RAPS RAPS components moved to RCB. The environmental effects are judged to be 7.1-15 favorable. RAPS leakage is processed through the RCB HVAC.
Padwaste The tritium concentration in the The combined effect of these changes is to System storage tank water has increased to reduce the postulated spill cleanup time Failures .62 x 10-6 C1/g from .25 x 10-6 Ci/g. and increase the whole body dose at the j (3.1) site boundary to 1.01 x 10-5 area from Storage tank cell parameters have 9.4 x 10-6 mrom,. but both are changed such as the floor area increase environmentally inconsequential.
I to 1,000 ft2 from 800 ft2 I
l Sump pump flow capacity increased to 50 gpa from 10 gpm.
- Refer to accident number in Environmental Report.
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 24 ER SEMION REVIBED ITEM DESCRIPTION OF CHANGE ENVIROMIENTAL EFFECT l Liquid Tritium concentration in storage tank water The combined effect of these changes is Radwaste has increased due to change in interface to increase the site boundary whole body ;
System diffusion coe[ficients. Concentration is dose 2.13 xfrom is postulated accident to 10- p from 5.0 x 10-3 areas both are Tank now .62 x 10 0 C1/g in SGS.
(3.2) environmentally inconsequential.
Spill cleanup time is reduced to 6.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> by using higher capacity sump pumps.
7.1.2.3.3 RAPS Accident redefined due to relocation of The environmental effects are judged to be
- Noble RAPS components. favorable.
Gas Stor- '
age vessel Rupture (3.3) 7.1.2.3.4 Deleted due to deletion of equalization line.
Rupture of cover gas Equalization Line (3.4) 7.1.2.4 7.1-16a thru Sodium Analyses revised to update computations. Environmentally inconsequential. i 7 4-21 Fire .
Accidents *
(4.1)
(4.2) 7.1.2.5 7.1-22 thru Fuel The current plant design has a higher purge The net ef fect of the changes is to 7.1-24 Failures rate of the cover gas which has reduced the reduce the site boundary whole body (5.1) available Xenon and Krypton activity to dose to 8.4 x 10-5 area from 3.4 x 56,588 Ci from 65,816 C1. 10-4 areas both are environmentally ,
inconsequential.
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CRBRP ENVIRONNENTAL REPORT REVIEW PAGE 25 ER SECTION REVISED ITEN DESCRIPTION OF CH ANGE ENVIROWNENTAL EFFBCT l 7.11-24 thru Steam A Levised DBL for the steam generator The net ef fect of the changes is to 7.1-27 Generator results in 465 lbs. of sodium mixing with increase the mrem site Mundaky b do Tube with water instead of 337 lbs. of sodium. to 8.3 x 10-2 from .1whol x 1 8-4 odmfen:se Rupture The tritium concentration in SGS is now both are insignificant.
(5.2) .62 x 10-6 C1/g and in the :ISTS is
.13 x 10-6 C1/g. This change is judged to be adverse, since this could potentially Deleted the centfifugal separator from result in the release of more sodium-the Sodium-Water Reaction Pressure Relief water reaction particulates into the Subsystem (SWRPRS). atmosphere.
The duration of the SWRPR venting to the atmosphere was increased from 15 to 28 seconds as a result of an updated TRANSWRAP No change to estimated environmental code analysis of this event. This more effects. 3 detailed analysis tracks the primary sodium t which might leak into the intermediate sodium.
It considers the length of piping between Ohe IHX and the superheater inlet, and the reduced -
sodium flow during blowdown and predicts that no primary sodium will reach the superheater during l this event for subsequent release to Uhe atmosphere.
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CRBRP ENVIRONMENTAL REPORT REVIEN PAGE 26 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFBCT 7.1.2.6 7.1-28 thru Spent Earliest scheduled time for fuel assembly The combined ef fect of the changes is to 7.1-32 Fuel handling is increased to 8 days from 87 increase the s Cladding hours. fra1.5x10gteboundarywholebgdydose nres to 2.13 x 10- area 4 Pallure both are environmentally inconsequential.
in the Revised ORIGEN isotope library was used EVTM to generate fission product inventories.
(6.1)
Spent The same changes that applied to Accident The net result of the changes is to Fuel 6.1 apply here. increase the site boundary whole body Cladding dose for this postulated accident fron
- Failure 1.5 mrem to 2.1 mesa, both are environ-i in the EVTM mentally inconsequential.
(6.2)
Accident- Revised ORIGEN isotope library was used The combined ef fect of the changes to ally to generator fission product inventories increase the site boondary whole body Opening Revisions were based on newer calculational dose to 1.08 stem from .07 areas both a Floor schemes. are environmentally inconsequential.
Valve (6.3) 7.1.2.7 7.1-33 Spent Isotope inventories were revised using The combined ef fect of the changes is to Fuel updated ORIGEN libraries. The ORIGEN decrease the site boundary whole body dose Cask changes were due to revisions in the to 2.8 x 10-4 meen from 9.3 x 10-3 mrems Drop library calculational schemes. both are environmentally inconsequential.
(7.1)
The fuel has undergone an 80 day cooling period instead of 100 days.
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 21 l
ER l SECTION REVIS ED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFECT 7.1.2.8 7.1-3 4 th r u Primary Primary sodium isotope inventory has The combined effect of the changes is to 7.1-43 Sodium changed due to revisions in the ORIGEN reduce the site boundary whole body dose Drain library calculational schemes. from 9.7 x 10-4 rem to 8.4 x 10-5 rems Tank both are environmentally inconsequential.
Failure Cell 102 A dimensions have changed. For (8.1) example, the cell volume s 45,000 f t.*
and was 68,000 f t.3 The potential sodium spill volume has increased to 35,000 gallons from 32,000 gallons.
Primary The postulated sodium spill has been Tne combined ef fect of the changes is to coolant reduced to 135,000 lbs. from 193,000. increase the site boundary whole body dose Sodium from 8.3 x 10-4 rem. to 1.25 x 10-2 rems b th Spill It was conservatively assumed that the are environmentally inconsequential.
(8.2) aerosol leaked to the RCB was vented directly to the environmental. Previously a leak rate of .1 volt / day at 10 psig. was assumed as the leak rate.
Ex-Con- The postulated spill has been reduced The net ef fect of the changes is to reduce tainment from 90,000 gal. to 45,000 gal, of sodium. the site boundary whole body dose f rom Primary This is the result of a failure of one of 7.9 x 10-3 ren to 4.2 x 10-5 rems both are Coolant two storage vessele in the cell rather environmentally inconsequential.
Sodium two.
Spill (8.3) The leak rate of aerosol was based on the cell design leak rate of .6 volt / day at 3.9 psig.
rather than 100 volt / day at 10 peig which was previously used.
Ex-Ves- Aerosol leakage to the RSB from the cell The net effect is to reduce the site sel Stor- was calculated based on a cell design boundary whole body dose from 2.1 x 10-4 age Tank leak rate of .36 volt / day at 12 psig. arem to 4.3 x 10-4 meens both are Coolant rather Chan 100 volt / day at 10 psig. environmentally inconsequential.
Rupture This approach will release less aerosol (8.4) into de environment.
Large The SGS tritium concentration has in- The combined effect is to increase the Steam creased to .62 x 10-6 C1/g from .25 site boundary whole body dose to 4.7 aren Line x 10-6 C1/g. This is the result of from 1.9 mress both are environmentally
, Break changes in diffusion coefficients across inconsequential.
(8.5) system interface boundaries.
The newer design basis results in 312,000 lbs.
. - of water being released from dhe PRV instead of 479,000 lbs. The power relief vent period
- has been increased from 1.5 to 5.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />.
CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 28 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIROH9 ENTAL BFFBCT 7.1.3 No change.
7.2.1 7.2-1 Hydrogen The total amount of Hydrogen gas stored has Environmentally inconsequential.
Gas not changed; however,' the volume has been Storage restated in terms of standard volume (28,000 l
SCF) rather than bottled storage capacity. This change will be provided in a future amendment to the ER.
t 7.2.2 New Oil and Systems / Buildings involved with the Incorporation of these features in station Hazard- storage, transfer, or loading / unloading design provides further protection against ous of any oil or hazardous material are spill of oil and hezardous material ,
Material provided with secondary containment reaching the local environment.
Spills systems capable of containing the Ervironmentally inconsequential.
largest source of an oil or hazardous material spill without any adverse environmental impact. This change will be provided in a future amendment to the ER.
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CRBRP ENVIRONMENTAI. REPORT REVIEW PAGE 29 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFBCT 8.0 8.1 (All Future) Socio- Complete assessment of socio-economic This change is judged to be slightly favorable. It provides current data 8.2 economic parameters of CRBRP plant construction
, 8.3 and operation is being provided in a future base f or evaluation of socio-economic
! amendment. Assessment is based on assessment.
current construction manpower rcquirements
! 1980 census and 1981 community service and infra-structure data.
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_ __ _ ____ _ _ = . _ _ _ __ _ _ _ _ _ _ . _ _ _ _ _
CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 30 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONMENTAL EFFBCT 9.1 To Be Provided Altern- This section will be addressed in tne Environmenta A Ay anconsequenta at. 1 ative supplement to the LMFBR Program Final Ap- Environmental Statement (PFES) . This pr oaches section of the ER will be revised accordingly.
9.2 To Be Provided Altern- a) Same as Section 9.1 above. Environmentally inconsequential.
ative b) For discussion of Hook-on arrangements Sites & refer to response to Question 320.1R Plant and 320.2R.
Arrange- c) Further discussion of candidate sites will ments be provided in the near future.
d) Section 9.2.5.3.4 will be updated to reflect response to Question 230.5R.
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 33 ER SECTION REVISED ITEM DESCRIPTION OF CHANGE ENVIRONIENTAL EFFBCT ,
12 12.0-1 thru Permits Provides revised listing of Non-NRC No changes in estimated environmental 12.0-7 permits purpose legislation and effects due to this tabulation.
regulation enacting permit approval or notification.
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CRBRP ENVIRONMENTAL REPO1T REVIEW PAGE 34 ER SECTION REVISED ITEN DESCRIPTION OF CHANGE ENVIROINENTAL EFFECT 13 13.0-3 thru Refer- Update to include Amendment IX references. No environmental effects.
13.0-38 ences
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CRBRP ENVIRONMENTAL REPORT REVIEW PAGE 35 ER SECTION REVISED ITEN DESCRIPTION OF CHANGE ENVIRONNENTAL BFFECT 14 14.1-2 thru Clean Incorporates 1977 amendment to the State The change is judged to be slightly (Appen- 14.1-81 Water of Tennessee Water Quality Criteria favorable. It provides criteria for dix to Act of incorporates the 1977 clean water act CRBRP design for reduction of impact on Ssction 1977 amendments to the Federal Water Pollution the environment.
2.5) Control Act.
14 14.3-3 Sauger Provides update information on spawning No environmental effects.
(Appen- of sauger.
dix to
- S ction 2.7) -
14 14.6-3 Cooling Updates cooling tower blowdown rate The increase in cooling tower blowdown ,
(Appen- Tower provides current design blowdown is judged to be insignificant compared !
dix to temperature values. to the Clinch River flow rate.
Ssction 10.3)
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ITEM 320.9R Update economic cost analyses developed in support of your decisions regarding alternative plant designs.
Specifically, Sections 10.1.5 (Tables 10.1-9 and 10.1-10) ,
10.2.5 (Tables 10.2-1 and 10.2-2) ,10.3.5 (Table 10.3-2) and 10.6.5.
RES PONSE Although the economic costs presented in the tables identified in the question are not up-to-date in current prices, the analyses remain valid. Since the time of the evaluation of these analyses by the NRC (NUREG-0319, February 1977) the major change has been the effect of inflation on the costs (both economic and environmental) included in the analyses. However, general price inflation has not affected the relative ranking of the alternatives nor the relative balance of environmental costs to economic costs. The only change that would invalidate the analyses would be the development of an advantage (either technological or economic) not previously available for one of the alternatives. For the facility systems referenced in the question, i.e., cooling system, sanitary waste system, and intake and discharge systems, significant changes such as new technologies with a lower cost that would require reanalysis of i alternatives have not developed. l Fur thermor e, the design, testing, and procurement of these facility systems are at advanced stages of completion. If a reanalysis were to be undertaken at this time, any alternative would have to demonstrate economic and environmental cost 0320.9R-1
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l advantages greater than the selected design's costs. These costs to be assessed against alternative systems would properly include j the amounts expended to date on the selected systems to design, l test and procure the equipment, the costs to termiante current contracts, and the environmental costs associated with scrapping fabricated components. In the case of the selected cooling system for the plant, i. e. , a mechanical draf t wet cooling tower, changes from this design could cause changes in plant performance parameters that might have costly cascading effects on the l current design and procurement of the steam / water cycle )
equipment. All of these " sunk" costs would properly be included in any updated analyses because the applicant has proceeded on the basis of previously valid evaluations of alternatives.
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Q320.9R-2
ITEM 460.1R Have any design changes been made in the radwaste treat-ment systems since the FES was published 2/77?
RESPONSE
Yes. These design changes are stated and included in the Response to Question 290.1R.
l ITEM 460.2R Have any changes been made that would cause the source term to be altered? This could include fuel and coolant specifications and behavior as well as operational aspects.
RES PONSE o There has been no change to the coolant specifications. !
o There have been changes to the fuel specifications due to the core design change from the homogeneous core to the heterogeneous core and these changes do result in some change to the source term. The following table provides a comparison of homogeneous core and heterogeneous core fuel specifications and the target average and peak burnups.
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0460.2R-1
Heterogenous Homogeneous Soecification Current Core Previous Core i
Total heavy metal 5.2 6.5
'nventory i in fuel (metric tons)
Plutonium enrichment 33.2 18.7 to 32.0 in fuel (Weight %)
Isotopic Composition of Feed Plutonium (%)
Pu-238 0.1 1 Pu-23 9 86.0 71 Pu-240 11.7 19 Pu-241 2.0 7 Pu-242 0.2 2 Target Burnup (MWD /T)
Average 80,000 100,000 Peak 110,000 150,000 Q460.2R-2
J o However, it should be noted that in determining the source terms for Proj ect use, the isotopic composition of LWR discharge plutonium was used instead of the composition in the fuel specification for conservatism.
o The source terms in the cover gas have remained relatively unchanged from the basis used in the 1977 amendments to the ER.
o changes in the inert gas processing system have had the following effects:
- 1) Noble gases are now sent from Increases dis-RAPS Noble Gas Storage Vessel charge from RSB to CAPS, rather than being HVAC bottled for disposal
- 2) RAPS Cryogenic Charcoal Beds Increases acti-have been deleted vity to CAPS, but CAPS charcoal beds supply hold-up time - little effect on offsite releases
- 3) Re-evaluation of CAPS Decrease in charcoal bed efficiency offsite releases
- 4) RAPS moved inside of RCB No effect on normal operation Favorable effect with regard to accidents 0460.2R-3
- 5) Effluents from other slightly increases systems to CAPS added discharge from RSB to the total effluent HVAC (effluents from refueling system, fail d fuel monitoring
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system, and maintenance system)
The net effect of these changes will be reflected in an upcoming ammendment to the ER. These changes are also contained in response to Question 290.1R.
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