View source for U-600627, Forwards Reassessment of Hazardous Matls Shipped Near Plant, Based on CY85 Survey Data for Illinois Central Gulf Railroad Gilman Line Per Sser 3 (NUREG-0853).Risks Associated W/Railroad Transportation Hazards Acceptably Low

{{Adams
| number = ML20206P315
| issue date = 06/30/1986
| title = Forwards Reassessment of Hazardous Matls Shipped Near Plant, Based on CY85 Survey Data for Illinois Central Gulf Railroad Gilman Line Per Sser 3 (NUREG-0853).Risks Associated W/Railroad Transportation Hazards Acceptably Low
| author name = Spangenberg F
| author affiliation = ILLINOIS POWER CO.
| addressee name = Butler W
| addressee affiliation = NRC OFFICE OF NUCLEAR REACTOR REGULATION (NRR)
| docket = 05000461
| license number = 
| contact person = 
| case reference number = RTR-NUREG-0853, RTR-NUREG-853
| document report number = U-600627, NUDOCS 8607020093
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 25
}}

=Text=
{{#Wiki_filter:, ,,
d D U-600627 L30-86(06-30)-L 1A.120 ILLIN0/S POWER COMPANY CLINTON POWER STATION. P.o. BOX 678. CLiNTON. ILLINOIS 61727 June 30, 1986 Docket No. 50-461 Director of Nuclear Reactor Regulation Attention: Dr. W. R. Butler, Director BWR Project Directorate No. 4 Division of BWR Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20555

==Subject:==
Clinton Power Station License Condition #14 Transportation Accidents

==Dear Dr. Butler:==

Clinton Power Station Safety Evaluation Report (NUREG-0853)
Supplement No. 3 (SSER #3) Section 2.2 stated the requirements associated with License Condition #14 as follows:
                      "... The applicant has provided a conservative analysis that concludesthattheannualprobabigityofaffectingplant safetysigniffcantlyisabout 10 for toxic materials and about 10~ for explosive materia.s.
The staff agrees with this finding. However, in light of the potential for significant changes in the hazardous material shipping patterns for this railroad, the Staff recommends a license condition that would require a periodic survey (every 3 years) of all shipments of hazardous material and a reassessment of the hazards associated with toxic material with respect to the railroad. With regard to toxic materials, the applicant shall (within 6 months of a negative finding) provide sensors that will isolate the control room heating, ventilation, and air conditioning system should identified chemicals present a toxic environment. The initial report shall be submitted to the NRC not later than July 1, 1986.
The shipping data shall be based on actual records of shipments made during the calendar year 1985. This report shall be updated every 3 years."
The accachment to this letter provides a reassessment of hazardous materials shipped near Clinton Power Station based upon calendar year 1985 survey data for the Illinois Central Gulf Railroad Gilman Line.
The survey data was obtained by reviewing railroad records of material shipped over the Cilman Line for 1985. The reassessment used the evaluation performed in 1983 (transmitted in a letter from G. E. Wuller, Illinois Power Company to A. Schwencer NRC, dated March 4, 1983) as a point of reference for determining the risk associated with the 1985 data. The SSER #3 write-up was based upon a review of the 1983 evaluation.                                                                                   g8[
0607020093 860630                                                         ,
PDR    ADOCK 05000461                                                         l E                  PDR

.e O-The reassessment contained in the attachment to this letter demonstrates that the risks associated with railroad transportation hazards remain acceptably low ar.d sensors that will isolate the control room heating, ventilating and air conditioning are not necessary.
It should be noted that based on a conversation with a representative of the Illinois Central Gulf Railroad, Illinois Power (IP) has been informed that two of the four trains normally scheduled on the Gilman Line no longer utilize this route as of April, 1986. Since these trains accounted for 88% of the total hazardous material traffic in 1985, IP expects a substantial decrease in future hazardous material traffic on the Gilman Line.
If you have any questions or require additional information, please call me.
Sincerely yours, Q.           .
j F.t..Sjang berg Manager-Lcensing/andSafety AJH/pj r Attachment cc:            B. L. Siegel, NRC Clinton Licensing Project Manager NRC Resident Office                                                                                                '
Regional Administrator, Region III USNRC Illinois Department of Nuclear Safety 1
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  , s P ga 1 of 10 Attachment to Letter # U- 600627 REASSESSMENT OF FLAMMABLE AND T0XIC HAZARDS ASSOCIATED WITH RAIL TRANSPORTATION PAST CLINTON POWER STATION USING 1985 SURVEY DATA This report provides an update to the hazards analysis performed in 1983 for flammable compressed gases and toxic materials shipped by rail over the Illinois Central Gulf Railroad Gilman Line. This update reevaluates these hazards in light of 1985 shipping data, using the 1983 evaluation (reference 1) as a point of reference where possible.
To obtain data for the present evaluation, Illinois Power (IP) performed a comprehensive survey of rail traffic on the Gilman Line from Illinois Central Gulf Railroad (ICGR) shipping records for the period of January 1, 1985 to December 31, 1985. Hazardous materials were identified on shipping records by a 49-series Standard Transportation Commodity Code number. This category includes flammable and toxic materials. Title 49 of the Code of Federal Regulations requires that hazardous materials must be identified on all shipping records. Therefore, this survey of hazardous materials was totally inclusive.
A summary of all hazardous materials shipped on the Gilman Line during 1985 is given in Table 1.
: 1. Hazard Analysis of Flammable Compressed Gas Table 2 indicates the number of flammable compressed gas shipments occurring over the Illinois Central Gulf Gilman Line for calendar year 1985. The totals for 1985 are comparable to the totals from the 1983 evaluation. The total mass of flammable gas shipped increased slightly (4%) during this period from 245,927 tons to 256,206 tons, while the total number of cars decreased slightly (4%) from 3472 cars to 3347 cars.
Because the total probability of an explosion hazard is proportional to shipment frequency (cars per year), as shown by equation 4.13 of the 1983 flammable hazards report, the explosion hazard ~9robability has decreased slightly since the 1983 evaluation from 2.3X10      events per year to 2.2X10" evegesperyear. Therefore the explosion hazard probability remains below 10- events per year and is acceptably low per Regulatory Guide 1.91,
            " Evaluations of Explosions Postulated to Occur on Transportation Routes Near Nuclear Power Plants."
: 11. Evaluation of Control Room Habitability during a Postulated Release of Toxic Material Shipped by Rail This portion of the report evaluates the hazards associated with rail trans-portation of toxic materials. It demonstrates that the toxic materials shipped near the Clinton Power Station (CPS) present no significant risk to control room habitability or nuclear safety.
I L

, e Pags 2 of 10 Regulatory Guide 1.78, " Assumptions for Evaluating the Habitability of a Nuclear Power Plant Control Room During a Postulated Hazardous Chemical Release,"               ,
specifies a control room    habitability evaluation for hazardous materials shipped by rail with a frequency    of thirty (30) or more times per year. The shipment survey indicated a total    of forty-two (42) hazardous materials shipped at least thirty times per year on    the ICGR Gilman Line near CPS. These chemicals are listed in Table 3.
In thin evaluation, chemien1s not aufffefently tovic to threaten control room habitability were eliminated on the basis of published toxicity data and criteria listed in Regulatory Guide 1.78. Any remaining chemicals were subjected to a diffusion analysis as described in Regulatory Guide 1.78. The Architect-Engineer for CPS, Sargent & Lundy, has developed the HAZCHEM computer program which utilizes this diffusion analysis to calculate the concentration in the control room of a chemical released a specified distance from the ventilation intake.
Details of the HAZCHEM methodology are given in Reference 1.
The following is a discussion of each of the chemicals listed in Table 3 and the resulting effect on the control room habitability of spills or gaseous releases involving these chemicals.
Butane, Propylene, Butene, Argon,and Butylene In the 1983 evaluation, toxicity information was used to eliminate some chemicals from further consideration. Butane, Propylene and Butene were eliminated in the 1983 evaluation on the basis of being simple asphyxiants that would not displace one-third or more of the control room air. According to Irving Sax's Dangerous Properties of Industrial Materials, third edition, up to a third of the air in a room can be displaced by a simple asphyxiant before a human being will experience adverse effects. Such concentrations in the control room, at a distance of 0.75 miles (the closest the Gilman Line passes to CPS) from the railroad tracks, are not credible since a minimum of 5% of the tank car content must enter the control room in order to displace one third of its air.
Argon and butylene niso meet these criteria and can be eliminated from consideration. Sax lists both of these chemicals as asphyxiants, and it is expected that they will not displace one-third or more of the control room air.
Isobutane, Liquid Petroleum Gas, and Butadiene As described in Reference 1, isobutane was eliminated on the basis of a toxicity rating of I given in bax's reterence. Chemicais with a toxicity rating ot i are defined as slightly toxic. They cause slight changes which are readily reversible and disappear after the end of the exposure. Reference 1 also climinated liquid petroleum gas (LPG) from further analysis due to a threshold limit value (TLV) of 1,000 ppm, which implies a high threshold of human tolerance. Thus, LPG was not considered to be sufficiently toxic to warrant further analysis.
Toxicity limits for butadiene were taken from Reference 4      The TLV given there is 1,000 ppm, which implies a high human tolerance. Thus, as for LPG, butadiene gas is also not considered to be sufficiently toxic to affect control room habitability.

, e Pags 3 of 10 Pseudocumene, Hydrogen Peroxide, Sulfuric Acid, Spent Sulfuric Acid, Phosphoric Acid (<77%), Phosphoric Acid, Sodium Hydroxide Cp48% water by weight), Corrosive Liquid (N.O.S.)* and Sodium Hydroxide (solid)
Regulatory Guide 1.78 states that liquids with vapor pressures less than 10 torr may be eliminated from further consideration. Pseudocumene, hydrogen peroxide, sulfuric acid, spent sulfuric acid, phosphoric acid (<.77% of phosphoric anhydride by weight), phosphoric acid, sodium hydroxide (liquid or solution,36 48% water by weight) and corrosive liquid (N.O.S.) all have vapor pressures less than 10 torr at 100*F. Sodium hydroxide     was eliminated from consideration since it is a solid at ambient temperature.
Petroleum Naphtha, Formaldehyde, Vinyl Acetate These chemicals were subjected to a diffusion analysis in the 1983 evaluation.
The results of the HAZCHEM program showed that insufficient amounts of any of these chemicals would reach the control room, following a railcar spill, to be hazardous for acute exposures. The largest shipment evaluated in the 1983 analysis was 97 tons for petroleum naphtha, 98 tons for formaldehyde and 101 tons for vinyl acetate. The 1985 survey revealed a slight increase in the largest shipment for these three chemicals (2%-3% increase), therefore, the resulting concentration values at the Main Control Room ventilation intake will not be affected significantly and are expected to be well within the maximum allowable concentrations (See Reference 1).
Denatured Alcohol Denatured Alcohol was analyzed via the HAZCHEM program in the 1983 evaluation (Reference 1). The largest shipment considered was 100 tons. The results of the analysis showed that toxicity limits were not exceeded. The 1985 survey also revealed a maximum shipment of 100 tons for denatured alcohol. Therefore, based on the results of the analysis performed in the previous evaluation, denatured alcohol has been determined to present no toxic hazards to the Clinton Power Station control room operators.
Styrene (Monomer)
Specific threshold limit values (TLV) for styrene (monomer) were not available, however, styrene is not considered a very toxic material. Sax (Reference 2) states that toxic effects of styrene (monomer) are usually transient and will disappear once exposure to this chemical is stopped. Experiments have found that 10,000 ppm was dangerous to animal life in 30-60 minutes, 2,500 ppm was dangerous to life in 8 hours, while 1,300 ppm was the highest amount for which no serious systemic disturbances occurred in 8 hours. From a study to determine the chronic effects of this material, it was discovered that rats exposed to 1,300 ppm for 7-8 hours / day, 5 days / week, for 26 weeks, showed evidence and definite signs of eye and nasal irritation and appeared unkempt, though they made a normal gain ir weight and presented no significant microscopic tissue changes or changes in the blood picture. The information presented by Sax implies a high threshold of human tolerance. In addition, styrene has a relatively low vapor pressure, 10 torr at 87'F which will minimize the evaporation rate and the resulting concentration in the control room 0.75 miles away. Therefore, based on its low vapor pressure and low toxicity, styrene (monomer) was not considered to be sufficiently hazardous to warrant further analysis.
* This abbreviation is used in the Standard Transportation Commodity Code as meaning "Not Otherwise Specified."

Pags 4 of 10 Flammable Liquid N.O.S., Combustible Liquid N.O.S.
Flammable liquid N.O.S. is defined as a liquid with a flash point at or below 100*F. Combustible liquid N.O.S. is a liquid with a flash point between 100 and 200*F. These categories include numerous chemicals that could be both toxic and non-toxic. However, the following generalizations can be made concerning the N.O.S. category:
: 1. N.O.S. chemicals are not likely to be highly toxic.                                    Shippers of hazardous material by rail are required to classify these materials by the Standard Transportation Commodity Code (STCC) that most closely describes the material. Only when the material does not specifically fit into one of the other existing categories will it be classified in an N.O.S. category.
Because highly toxic chemicals that are shipped in any significant quantity normally have an explicit STCC assigned to them, those chemicals in the N.O.S. category are not likely to be highly toxic.
: 2. Because the N.O.S. category could include many chemicals and since chemicals that are shipped in significant quantities typically are assigned an explicit STCC number, the quantity of any single material shipped under an N.O.S.
category is likely to be small. Therefore, if the chemicals shipped under an N.O.S. category could be identified, they probably could be eliminated on the basis of low shipment frequency (j30 cars per year) or low probability of a hazard to the control room ( < 10~).
Based upon the foregoing discussion chemicals falling under the N.O.S. category have been eliminated from further consideration.
Weed or Tree Killing Compound Information on the specific '.ype of chemicals included in this category was not available. However, based on the method of application for these materials, they are expected to be of low volatility and low human toxicity, thus causing little or no concern to control room operators in the ever.c of a spill on the Gilman Line near CPS. Experimental data from Reference 8, on the relative toxicity of some of these compounds to rats, shows the majority of the herbicides considered as being slightly toxic or almost non-toxic. The objective is to produce compounds that protect animals, birds, and fish, as well as humans, while still dealing with a particular vegetation problem. In addition, this general category could include many chemicals and since chemicals shipped in significant quantities typically are assigned an explicit STCC number, the quantity of any single material shipped under " weed or tree killing compound" is likely to be small. Based on the above, this material was not considered for further analysis.
Combustibic Liquid N.O.S. (Glycol Ethers)
This category of materials could include a number of glycol ethers. Examples of
,                  glycol ethers found in toxicology literature (reference 9) include the following:
Chemical                vapor Pressure 0 20'C                                     Exposure Limits (ppm)
Ethylene glycol               0.76 Torr                                             700 (IDLil) monobutyl ether Dipropylene glycol            0.3 Torr                                              150 (STEL) methyl ether

Pega 5 of 10 Chemical                    Vapor Pressure @ 20*C        Exposure Limits (ppm)
Ethylene glycol                   3.7 Torr                6,000 (IDLH) monoethyl ether                                                               ,
Ethylene glycol                   2.0 Torr                2,500 (IDLH) monoethyl ether acetate Ethylene glycol                   2.6 Torr                   25 (TLV)*
monoisopropyl ether Ethylene glycol                     6 Torr                2,000 (IDLH)***
monomethyl ether Ethylene glycol                     2 Torr                4,500 (IDLH) monomethyl ether acetate Propylene glycol                Not Available               150 (STEL) monoethyl other Notes:      STEL - Short Term Exposure Limit concentration - This value is the maximal concentration to which workers can be exposed for a period up to 15 minutes continuously without suffering from:   irritation; chronic or irreversible tissue changes; or narcosis of sufficient degree to increase accident proneness, impair self-rescue, or materially reduce work efficiency, provided that no more than four excursions per day are       i permitted, sich at least 60 minutes between exposure periods.***
IDLH - Immediately Dangerous to Life or Health concentration - This concentration represents a maximum level from which one could escape within 30 minutes without any escape impairing symptoms or any irreversible health effects.***
TLV - Threshold Limit Value - This is the maximum concentration of a chemical to which a human can be safely exposed for several hours daily over long periods of time.
* Data from Reference 9
    ** Data from Reference 10                                                                 '
    *** Data from Reference 11 As can be seen from the above data, chemicals falling under the category of glycol ethers typically have low vapor pressures implying low volatility. They also typically are not highly toxic as the data implies. Therefore this category of materials is not expected to cause incapacitating effects on the plant operators who are located in the control room, a minimum of 0.75 mile from potential spill locations. Therefore this category has been eliminated from further consideration.
Oil N.O.S., Petroleum 011 A number of different chemicals or mixtures of chemicals could be classified under the category of oil N.O.S., petroleum oil. A review of toxicology literature (Reference 9) indicates that some potential constituents of this category produce toxic effects, and some may have carcinogenic effects. However, there was no indication ehat any of these chemicals are toxic enough to cause operator incapacitation at a distance of 0.75 miles.

Pagn 6 of 10 Ethyl, Acetate, Propyl Alcohol, Propyl Acetate, Butyl Alcohol, Butyl Acrylate, 2-Butanol, Butyl Acetate, Isobutyl Acetate, Acrylonitrile, Ethyl Acrylate, Acetic Acid These substances are toxic chemicals with vapor pressures above 10 torr and were therefore evaluated via the HAZCHEM program. The HAZCHEM results showed that the resulting concentrations in the control room, for each of these chemicals, would be insufficient to be hazardous to plant operators (see Table 4).
Anhydrous Ammonia, Ethyler.e Oxide. Hydrochloric Acid HAZCHEM results indicated that these chemicals could render the control room uninhabitable if a rail car containing the maximum shipment quantity should spill its entire contents under specific conditions. A further evaluation was required to determine if a significant probability existed for a transportation accident involving these chemicals which could incapacitate the control room operators.
NUREG-0800, " Standard Review Plan," Section 2.2.3, provides criteria for determining if a toxic release need be considered a design basis event.
Specifically, NUREG-0800 states:
         "The probability of occurrence of the initiating events leading to potential consequences in excess of 10 CFR Part 100 exposure guidelines should be estimated using assumptions that are as representative of the specific site as is practicable. In addition, because of the low probabilities of the events under consideration, data are often not available to permit accurate calculation of probabilities. Accordingly, the expected rate of occurrence ofpotentingexposuresinexcessofthe10CFRPart 100 guidelines of approx-imately 10~ per year is acceptable if, when combined with reasonable qual-itative arguments, the realistic probability can be shown to be lower."
The risk assessment analysis in this report, as in the original report (Reference 1), employs two conservative and cross-checking methods to calculate the probability of a railcar rupture and toxic material release serious enough to affect the hat itability of the CPS Control Room.
The first probability calculation is a function of the probability of release per car mile and the shipping frequency in cars per year. The probability of releases reaching the control room per year of a railcar carrying hazardous materials is Pa = Pr(C) x F(C) x kL(D)xPw(D)           (1)
D=1 where:
Pa = probability of release reaching the control room (releases) year Pr(C) = probability of railcar releases       releases (car mile)
F(C) = frequency of shipment      ears gyear)
L(D) = length of track under consideration (function of wind direction)
(miles)

Pcga 7 of 10 Pw(D) =    probability that a wind of any stability class and any velocity class is blowing in a direction such that a toxic chemical release is carried toward the control room air intake (function of wind direction) [dimensionless]
D is the direction Erom which the wind is blowing (W, WNW, etc.). Only those eight wind directions from which a wind could blow from the railroads towards the plant are included (see Figure 1).
The second probability calculation is a function of the probability of release per ton mile and the shipping frequency in tons per year. The probability of a release reaching the control room per year of a railcar carrying hazardous material is:
Pa = Pr(T) x F(T) x y_,L(D) x Pw(D)       (2)
D=1 where:
Pa, L(D), Pw(D), and D are as defined before and, Pr(T) = probability of railcar releases (releases) ton mile F(T) ~ frequency of shipment       tons (year)
For the purpose of the probability calculations, minor releases are excluded because they do not threaten control room habitability. The probability of a release reaching the control room is based on major releases; those releases expected to threaten control room habitability as a result of an accident causing at least $5000 in damages (loss of lading, property damage, cleanup crew, etc.).
The assumption of using accident frequencies with damages of at least $5000 is reasonable since nearly all hazardous materials are shipped in quantities which are worth at least $5000. Loss of lading alone would exceed the $5000 criterir.,
exclusive of damage or emergency response effort costs.
Using railcar accident frequency data from Tables 5 and 6, anhydrous ammonia, classified as a non-flammable gas, has accident (release) frequencies of:
                               -6 Pr(C) = 0.019 x 10        releases gcar mile)
                              ~9 Pr(T) = 0.27 x 10       (releases) ton mile From Table 3, anhydrous ammonia has shipping frequencies of:
F(C) = 95      ears gyear)
F(T) = 7,387 tons gyear)

Pcg2 8 of 10 From Table 7:
L(D) x Pw(D) = 0.5769 [ miles]
Using equation (1), the probability of an anhydrous ammonia release reaching the control room is:
                            -6 Pa = 0.019 x 10       releases           cars gcar mile) x 95   (year) x 0.5769 miles
                           -6
               = 1.04 x 10 Ereleases}
year Using equation (2), the probability of an anhydrous ammonia release reaching the control room is:
Pa = 0.27 x 10"'                            tons (releasesj ton mile x 7,387 (year) x 0.5769 miles
                           -6
               = 1.15 x 10       releases I          I year Similar Calculations were made for ethylene oxide and hydrochloric acid. The following table indicates the accident (release) frequencies for these chemicals along with their shipping frequencies and the resulting probabilities of a release reaching the control room:
Pr(C)     Pr(T)     C      T       Pa(C)    Pa(T)
Chemical              Class
                                            -6       -9                       -6       -6 X10       X10       Year   Year    X10      X10 Ethylene Oxide      Flam Liquid 0.110       1.6        57   4,517   3.61      4.17 Hydrochloric        Corrosive    0.09       1.10       93   8,527   4.83      5.41 Acid These probabilities indicate that the expected rates of occurrences for the iniciating events leading to potential cogsequences in excess of 10 CFR Part 100 exposure guidelines are approximately 10        per year. These frequencies are acceptable since the realistic probabilities can be shown to be lower due to the following conservatisms:
: 1. No credit was taken in the railcar release probabilities for the improved safety due to tank car modifications required after February 28, 1981.
Information available from the U.S. Department of Transportation for the calendar year 1984 (Reference 5) shows a definite improvement of the trend in railroad accidents; between 1980 and 1984, the total number of railcar accidents in which there was a release of hazardous materials decreased nearly 50%.
: 2. No credit was taken for railcar accidents which do not result in the release of hazardous materials. The value used for the probability of a railcar release, Pr, as taken from Tables 5 and 6 actually is the accident probability value for railcars carrying hazardous materials where the

Pcga 9 of 10 accident damage cost was greater than $5000.00. This accident frequency rate does not necessarily imply that a release of the hazardous material had occurred, much less a release involving the entire contents of the car as assumed by the HAZCHEM analysis. From Reference 5, accident data for 1984 indicated that of 581 railcars damaged while carrying hazardous material, only 100 released any of their contents.
: 3. No credit was taken for unstable winds. Stability classes A, B and C were considered even though these Pasquill Categories result in highly unstable atmospheric conditions that would not be conducive to a slow diffusion of the toxic chemicals.
: 4. No credit was taken for the effects of the cooling lake. The nearest control room air intake faces Lake Clinton. A significant impact of the lake will be the warm surface it presents to the atmosphere which, during nighttime and winter, will be significantly warmer than the surrounding ground. This increase in temperature will cause the layer of air in contact with the lake to achieve a neutral lapse rate, especially when stable conditions prevail over the land. Thus, material released from a ground-level source would receive additional diffusion in the vertical direction over the lake than would be computed using a stable differential temperature stability cate6ory determined from the meteorological tower.
: 5. No credit was taken for operator incapacitation events that would not result in offsite radiological exposures in excess of 10 CFR 100 guidelines. This analysis assumed all such events resulted in an accident and subsequent radiological overexposure. There is precedent for assuming that only one out of ten operator incapacitation events would result in an overexposure (see Reference 6, Control Room Habitability Study, Beaver Valley Station).
Since the probability analysis used a conservative approach with conservative data andsincethecalculagedprobabilityoftoxicreleasesforeachofthechemicals was approximately 10 per year, anhydrous ammonia, ethylene oxide, and hydrochloric acid releases need not be considered as design basis accidents.
Conclusion This study evaluated all hazardous materials shipped via rail in the vicinity of Clinton Power Station. The shipments of flammable compressed gas were basically identical to the 1983 evaluation and thus the previous acceptable conclusions remain valid. With respect to toxic material, each substance was systematically evaluated and eliminated based on shipping frequency, potential toxicity, low vapor pressure, or an assessment of risk probability.
Based on the results of this evaluation, risks associated with railroad transportation hazards remain acceptably low and additional sensors that will isolate the control room heating, ventilating and air conditioning system are not necessary.

Pega 10 of 10 References
: 1.   " Evaluation of Control Room Habitability During a Postulated Release of Toxic Materials Shipped By Rail," Illinois Power Company, Clinton Power Station-Unit 1. Letter # U-0608, dated March 4, 1983, from G. E. Wuller, Supervisor-Licensing Nuclear Station Engineering (IPC), to A. Schwencer, Chief-Licensing Branch No. 2 (NRC)
: 2. Sax, N. Irving, Dangerous Properties of Industrial Materials, Fif th Edition, Reinhold Book Corp., New York,    N.Y., 1979.
: 3. Broker, William and A. L. Mossman, Matheson Gas Data Book, Fifth Edition, September 1971.
: 4. Toxic and Hazardous Industrial Safety Manual International Technical Information Institute, Toranomon-Tachikawa B1dng, 6-5, 1 Chome, Nishi-Shimbas!.1, Minato-Ku, Tokyo, Japan. 1984.
: 5. Accident / Incident Bulletin No. 153, Calendar Year 1984, U. S. Department of Transportation - Federal Railroad Administration Office of Safety.
: 6.   " Control Room Habitability Study, Beaver Valley Power Station Units Nos. I and 2," prepared for Duquesne Light Company, by Stone and Webster Engineering Corporation, December 1, 1981.
: 7. Sax N. Irving, Lewis J. Richard, Rapid Guide to hazardous Chemicals in the Work Place, Reinhold Book Corp., New York,    N.Y., 1986.
: 8. USDA Agriculture Handbook No. 332, 1969.
: 9. Documentation of The Threshold Limit Values and Biological Exposure Indices, American Conference of Governmental Industrial Hygienists Inc., Fifth Edition, 1986.
: 10. Pocket Guide to Chemical Hazards, U.S. Department of Health and Human Services, September 1985.
: 11. Sittig, Marshal, Handbook of To<ic and Hazardous Chemicals and Carcinogens, Second Edition, Noyes Publications, Park Ridge, N.J., 1985.

P:g') 1 of 8 l
TABLE 1
;                  HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE 1/1/85 to 12/31/85 STCC No. Description of Commodity            Carloads   Tons NONFLABOG3LE COMPRESSED GAS:
4904120  . Chlorine                                17    1,298 4904210   Anhydrous Ammonia                        95    7,387 l     4904503   Argon                                    32    2,706 4904509   Carbon Dioxide                            5      400~
FLAMMABLE COMPRESSED CAS:
i     4905702   Butane (butane, impure for                2       140 further refining) 4905704   Butadiene Gas                          129    10,284 4905706   Butane                                 452    35,158 l     4905707   Liquefied Petroleum Gas (butene        264    19,041 gas liquefied)
!     4905711   Liquefied Petroleum Gas (butylene,       72    5,415 impure for further refining) 4905747    Isobutane                            1321   102,771 l
4905750    Isobutane (Isobutane for further         3       245 refining processing) 4905752    Liquefied Petroleum Gas               377    27,903 4905758   Methyl Acetylene Propadiene               2       145 4905761    Methyl Chloride                          1        70 4905781    Propane                                 29    2,142 l
4905782    Propylene                             695    52,892 FLAMMABLE LIQUIDS:
l     4906011    Aluminum Alkyl                          10       375 4906420    Acrylonitrile                          127   11,176 4906610    Ethylene oxide                          57    4,517 i
L

Paga 2 of 8 TABLE 1 HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE 1/1/85 to 12/31/85 STCC No. Description of Commodity            Carloads  Tons 4906620   Propylene oxide                          20   1,542 4907215   Ethyl Acrylate, inhibited                58   4,792 4907219   Dicyclopentadiene                         4     323 4907245   Methyl Acrylate                          14   1,032 4907250   Methyl Methacrylate                       2      152 4907265   Styrene Monomer                        108    8,298 4907270   Vinyl Acetate                          333   30,133 4907280   Vinyldene Chloride                       11     958 4907420   Epichlorohydrin                          25   1,452 4907425   Allyl Alcohol                             5     372 4907829   N.O.S.                                    5     392 4907846   Morpholine                                6     495 4908105   Acetone                                   2      165 4908110   Benzene (benzol)                         12      748 4908120   Butylamine                                2      130 4908156   Ether                                    19   1,250 4908183   Hexane                                    7     404 4908270   Propionaldehyde                           1       75 4908290   Tetrafluorohydrofuran                    16   1,678 4909105   Alcohol                                  18   1,420 4909110   Alcohol, N.O.S. (ethyl alcohol,            1      96 anhydrous, denatured in part with petroleum products and/or chemicals not to exceed 5%)
4909117    Butyl Alcohol (n-butyl alcohol)         30   2,146 4909128    Butyl Acetate                           75   6,978

Pags 3 of 8 TABLE 1 HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE 1/1/85 to 12/31/85 STCC No.       Description of Commodity                          Carloads                               Tons 4909129        2-Butanol                                             91                                  6,755 4909130        Butyl Alcohol'(tert-butyl alcohol)                       2                                   135
{
1 4909131        Butyl Alcohol (isobutyl alcohol)                       20                                 1,402 4909132        Ethyl Butyrate                                           1                                    38 4909141        Denatured Alcohol                                    142                                  9,887 4909149        Diacetone Alcohol                                        4                                  336 i
Ethyl Acetate                                                                             5,518 4909160                                                               67 j                   4909166        Ethylene Dichloride                                      5                                  475 4909190        Heptane                                                 15                                  971
 )                   4909205        Isopropanol                                            25                                 1,944 s
i                    4909206         Isopropanol                                             2                                   129 4909207        Isobutyl Acetate                                       35                                 2,890 i                    4909210         Isopropyl Acetate                                      12                                  847 i
4 4909230        Methanol (methyl alcohol, wood                          29                                2,427 alcohol, columbian spirits) 4909243        Methyl Ethyl Ketone                                     23                                2,026 i
{
4909245         Flammable Liquid, N.O.S. (Methyl                       20                                1,406 Isobutyl Ketone) i                    4909267         Propyl Alcohol                                         99                                8,249
 ;                   4909268         Propyl Acetate                                         46                                4,276 4909300          Flammable Liquid, N.O.S.                                1                                   73 4909305         Toluene                                                11                                   754 4909350         Xylene                                                 25                                1,718 4909356         Toluene                                                  1                                   90 i

 ;                                                                                                                                                   Paga 4 of 8 i
i
!-                                                                                               TABLE 1 i
{-                                                                   HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE j                                                         .                      1/1/85 to 12/31/85 STCC No.      Description of Commodity                                            Carloads           Tons 4910153       Paint Related Material                                                     3             274 i
;                                                4910185       Flammable Liquid, N.O.S.                                                  37           2,559
 !                                               4910187       N.O.S.                                                                     8             608 4910245       011, N.O.S. Petroleum                                                      3             225
!                                                4910252       Eaint/ Asphalt                                                             1               76 4910259       Petroleum Naphtha                                                         58           4,060 i                                                4910282       Resin Solution                                                             5             360 i
4910297       Solvent (N.O.S.)                                                           1              100 4910371       Petroleum                                                                  1               30 4910444        Flammable T! quid, N.O.S. (Resin                                          2              155 Solution) 4910490       Aromatic Concentrates                                                      2              160 i
I                                                                                                                                                                  '
COMBUSTIBLE LIQUIDS:
L 4                                                 4912210       Butyl Acrylate                                                            1               94
;                                                 4912215       (Butyl Acrylate) Combustible Liquid,                                     88           7,204 j                                                                       N.O.S.
!                                                 4912220       Ethyl                                                                     6             568 i                                                 4913103      Alcohol, N.O.S.                                                            8             592 4                                                 4913116       Ethylene Glycol Monoethyl Ether                                          13           1,022 4913144       Formaldehyde (or) formalin solution                                        1              94 4913158       Octyl Alcohol                                                             7              541
)
4913161       Pseudocumene                                                            218          16,483 4
l                                                4913162       Ethylene Glycol Monomethyl Ether                                         17           1,154 I
j                                                 4913168       Formaldehyde                                                            202          15,994
{                                                 4913179       Combustible Liquid, N.O.S.                                               10              649 7
(cyclohexanone) i

Paga 5 of 8 TABLE 1 HAZARDOUS MATERTAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE 1/1/85 to 12/31/85 STCC No. Description of Commodity             Carloads  Tons 4913184   Dimethylaminoethanol                       1       83 4913185   Diethylhydroxylamine                       1       90 4913194   Combustible Liquid, N.O.S.                80   6,479 (glycol ethers) 4915112   Fuel Oil No. 1,2,4,5, (or) 6              22   1,438 4915157   Weed or Tree Killing Compoand             91   7,087 4915158   Combustible Liquid                         2      150 4915185   Combustible Liquid (N.O.S.)               98   7,635 4915187    Solvent (N.O.S.)                          3     243 4915195   N.O.S.                                     1       74 4915242   Combustible Liquid, N.O.S.                 3      135 (petroleum lubricating oil) 4915243   Petroleum Naphtha                          1       81     ,
4915245   Oil, N.O.S. Petroleum 011                 37   1,628 4915258    Petroleum Distillate                     11   1,039 4915259    Petroleum Naphtha                       126   8,569 4915282    Resin Solution                            2      160 4915371    Detergent Intermediates                   2      130 4915535    Combustible Liquid, N.O.S. (additives, 6         282 fuel oil, gasoline or lubricating oil, containing less than 50% by weight of petroleum) 4915546    Fatty Alcohols                             1      74 4915747    Cleaning Compound                          1      60 FLAMMABLE SOLIDS:
4916320    Phosphorous Pentasulfide                   7     502 4916420    Lichium Aluminum Hydride                   1      85

Pagt 6 of 8 l
TABLE 1 HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE 1/1/85 to 12/31/85 STCC No. Description of Commodity            Carloads   Tons OXIDIZING MATERIALS:
4918310   Ammonium Nitrate                          1        85 4918335   Hydrogen Peroxide C752%)                 61    6,068 4918525   Nitrating Acid Oxydizer                   9      722 4918746   Sodium Nitrate                            4      206 4918747   Sodium Nitrite                            1        99 4918776   Hydrogen Peroxide (40-52%)               13      619 ORGANIC PEROXIDES:
4919141   Tetrabutyl Peroxide                       2       100 POISONS B 4921220   Carbolic Acid, (or) phenol                1        93 4921445   Motor Fuel Anti-Knock Compound            4      217 4921466   Orthonitroaniline                         2       104 4921575   Toluene Disocyanate Poison                6      501 4923228   Sodium cyanide                            1        97 CORROSIVE MATERIALS:
4930010    Fluorasulfonic Acid                      2       158 4930030   Oleum                                     5      482 4930040    Sulfuric Acid                        1,310  122,562 4930042    Spent Sulfuric Acid                    124    9,188 4930228    Hydrochloric Acid (Muriatic Acid)       93    8,527 4930231    Hydrochloric Acid                        3       296 4930245    Nitrating Acid                           1        80 4930247    Phosphoric Acid (<77% Anhydride)        40    3,609

r__
Paga 7 of 8 TABLE 1 HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE 1/1/85 to 12/31/85 STCC No. Description of Commodity            Carloads    Tons 4930248   Phosphoric Acid                          53     4,325 4931303   Acetic Acid                              40     3,093 4931304   Acetic Anhydride                          6       556 4931405   Acrylic Acid                              9       638 4931426   Dodecy1 benzene Sulforic Acid            14     1,125 4932343   Ferric Chloride                           1         60 4932352   Phosphorous Oxychloride                   2         50 4935230   Potassium Hydroxide                       7       619 4935235   Sodium Hydroxide, dry solid, flake       19     1,795 bead, (or) granular 4935240   Sodium Hydroxide, liquid (or)          113     10,740 solution 4935243   Sodium Hydroxide, liquid (or)          183     18,124 solution (containing not less than 48% water by weight in solution) 4935248   Liquid (N.O.S.)                           1         90 4935268   Ethylenediamene                           5        330 4935665   Methanolamine                            23     1,800 4935675   Hydroxyethylacrylate                      1         70 4936540   Corrosive Liquid, N.O.S.                 37     3,188 4936556   Acid Corrosive Material                   1         10 OTHER REGULATED MATERIAL - GROUP A:
4941125   Agricultural Insecticides                  1        60 4941161   Maleic Anhydride                         13        707

Pags 8 of 8 TABLE 1 HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE 1/1/85 to 12/31/85 STCC No. Description of Commodity            Carloads  Tons GROUP E:
4963334    Insecticides                            1       92 4963374   Sodium Dodecy1 benzene Sulfonate         2      150 4966750   Ammonium Thiosulfate                     4      401 4966756   Ammonium Thiosulfate                      1      99 496780    Zine Bromide                             5      325

Paga 1 of 1 TABLE 2 FLAMMABLE COMPRESSED GAS SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE 1/1/85 to 12/31/85 STCC No.      Description of Commodity             Carloads   Tons 4905702       Butane (butane, impure for                 2       140 further refining) 4905704       Butadiene Gas                            129   10,284 4905706       Butane                                   452   35,158 4905707       Liquefied Petroleum Gas (butene          264   19,041 gas liquefied) 4905711       Liquefied Petroleum Gas (butylene,        72    5,415 impure for further refining) 4905747       Isobutane                              1,321  102,771 4905750       Isobutane (isobutane for further           3      245 refining processing) 4905752       Liquefied Petroleum Gas                  377   27,903 4905758       Methyl Acetylene Propadiene                2       145 4905761       Methyl Choride                             1        70 4905781       Propane                                   29    2,142 4905782       Propylene                                695   52,892 Total 3,347   256,206 STCC: Standard Transportation Commodity Code

Page 1 of 2 TABLE 3 HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLINOIS CENTRAL GULF RAILROAD GILMAN LINE (With a Shipment Frequency of 30 or more Cars per year) 1/1/85 to 12/31/85 STCC No.        Description of Commodity            Carloads       Tons 4904210         Anhydrous Ammonia                         95       7,387 4904503         Argon                                     32       2,706 4905704         Butadiene Gas                           129       10,284 4905706         Butane                                  452       35,158 4905707         LPG (Butene Gas, Liquefied)             264       19,041 4905711         LPG (Butylene)                            72       5,415 4905747          Isobutane                            1,321      102,771 4905752         LPG                                     377       27,903 4905782         Propylene                               695       52,892 4906420         Acrylonitrile                           127       11,176 4906610         Ethylene Oxide                            57       4,517 4907215          Ethyl Acrylate, inhibited                58       4,792 4907265          Styrene Monomer                         108       8,298 4907270         Vinyl Acetate                           333       30,133 4909117          Butyl Alcohol (n-butyl alcohol)          30       2,146 4909128          Butyl Acetate                            75       6,978 4909129          2-Butanol                                91       6,755 4909141          Denatured Alcohol                       142       9,887 4909160          Ethyl Acetate                            67       5,518 4909207          Isobutyl Acetate                         35       2,890 4909267          Propyl Alcohol                           99       8,249 4909268          Propyl Acetate                           46       4,276

Pags 2 of 2 TABLE 3 HAZARDOUS MATERIAL SHIPMENTS OVER THE ILLIN0IS CENTRAL GULF RAILROAD GILMAN LINE (With a Shipment Frequency of 30 or more Cars per year) 1/1/95 to 12/31/85 STCC No.        Description of Commodity             Carloads      Tons 4910185         Flammable Liquid, N.O.S.                 37        2,559 4910259         Petroleum Naphtha                        58        4,060 4912215          (Butyl Acrylate) Combustible Liquid     88        7,204 N.O.S.)
4913161         Pseudocumene                            218       16,483 4913168         Formaldehyde                            202       15,994 4913194         Combustible Liquid, N.O.S. (Glycol       80        6,479 ethers) 4915157         Weed or Tree Killing Compound            91        7,087 4915185         Combustible Liquid (N.O.S.)              98        7,635 4915245         011, N.O.S. Petroleum 011                37        1,628 4915259         Petroleum Naphtha                       126        8,569 4918335         Hydrogen Peroxide 0>52'!)                61        6,068 4930040          Sulfuric Acid                        1,310      122,562 4930042          Spent Sulfuric Acid                    124        9,188 4930228         Hydrochloric Acid (Muriatic Acid)        93        8,527 4930247          Phosphoric Acid (<77% Anhydride)        40        3,609 4930248          Phosphoric Acid                         53        4,325 4931303         Acetic Acid                              40        3,093 4935240          Sodium Hydroxide, Liquid or            113       10,740 Solution 4935243          Sodium Hydroxide, Liquid 0>48%         183       18,124 H3 0 by weight) 4936540          Corrosive Liquid, N.O.S.                37        3,188

Pcgs l'ef 2     !
TABLE 4 HAZCHEM Calculations of Toxic Chemical Concentrations at Clinton Power Station Concentration in              Maximum Quantity    the Control Room              Allowable Calculated 2                  Concentration 8                References / Comments 8 Chimical          Evaluated
                                           -5                          -5        8       Reference 7/PEL value used for Ethyl Acetate      97 tons    4.9 x 10         lb/ft 8
9 x 10      lb/ft (220 ppm)                     (400 ppm)              Maximum Allowable Concentration
                                                                          -5 96 tons    1.9 x 10
                                            -5         8      3.07 x 10        lb/ft 8   Reference 7/PEL value used for Propyl Alcohol                                 lb/ft (200 ppm)              Maximum Allowable Concentration (126 ppm)
                                                                          -5 100 tons    1.8 x 10
                                            -5 lb/ft 3      5.22 x 10        lb/ft 8   Reference 7/PEL value used for Propyl Acetate                                                                         Maximum Allowable Concentration (69 ppm)                       (200 ppm)
                                              -5         8                -5         8   Reference 7/PEL value used for Butyl Alcohol      99 tons    0.29 x 10          lb/ft       1.89 x 10       lb/ft (15 ppm)                       (100 ppm)            Maximum Allowable Concentration
                                                                          -6         8   Reference 7/2XTLV value used for Butyl Acrylate      121 tons   2.98 x 10-        lb/ft 8
6.55 x 10       lb/ft (9.1 ppm)                      (20 ppm)             Maximum Allowable Concentration
                                              -5                           -5         8  Reference 7/PEL value used for 2-Butanol          100 tons   0.30 x 10         lb/ft 8    2.84 x 10       lb/ft (16 ppm)                       (150 ppm)           Maximum Allowable Concentration
                                              -5          8                -5         8  Reference 7/PEL value used for Butyl Acetate      110 tons   0.84 x 10         lb/ft       4.45 x 10       lb/ft (28 ppm)                       (150 ppm)           Maximum Allowable Concentration
                                             -5         8                  -5         3  Reference 7/PEL value used for Isobutyl Acetate   98 tons    1.0 x 10         lb/ft        4.45 x 10        lb/ft (35 ppm)                       (150 ppm)           Maximum Allowable Concentration
                                               -5         8    15.3 x 10
                                                                           -5         8  Reference 10/IDLH value used for Acetic Acid        105 tons   0.63 x 10         lb/ft                        lb/ft Maximum Allowable Concentration (41.4 ppm)                     (1000 ppm)
                                               -4          8   5.41 x 10
                                                                           -4          8  Reference 10/IDLH value used for Acrylonitrile       99 tons   0.44 x 10          lb/ft                       lb/ft Maximum Allowable Concentration (327 ppm)                      (4000 ppm) 8                -4         8  Reference 10/IDLH value used for Ethyl Acrylate      96 tons    0.21 x 10~        lb/ft       5.12 x 10       lb/ft (83 ppm)                       (2000 ppm)          Maximum Allowable Concentration
                                                                                 .*G

Page 2 of 2 Table 4 Notes:
: 1. The amount analyzed is the maximum railcar shipping weight from the survey.
: 2. The concentration shown is taken at I hour and 2 minutes following a chemical spill. This is due to an assumed maximum soak-in time for the chemical spilled of I hour.
: 3. The definition of the various terms used are as follows:
PEL - Permissible Exposure Limit.
This is the allovable average concentration to which employees may be exposed for an eight hour working shift.
This is an Occupational Safety and Health Administration (OSHA) limit.
TLV - Threshold Value Limit.
This is the maximum concentration of a chemical to which a human can be safely exposed for several hours daily over long periods of time.
IDLH - Immediately Dangerous to Life or Health concentration.
                   .This concentration represents a maximum level from which one could escape within 30 minutes without any escape impairing symptoms or any irreversible health effects.
                                                             ,-   -}}