ML19031A508

Forwards Revised Copy of Section 2.1 of Salem Environmental Technical Specifications as Requested in Letter of 05/28/1975

ML19031A508
Person / Time
Site:	Salem
Issue date:	06/26/1975
From:	Mittl R Public Service Electric & Gas Co
To:	Youngblood B Office of Nuclear Reactor Regulation
References
Download: ML19031A508 (14)

Text

Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /622-7000 June 26, 1975

,. . ~:

Mr. B. J. Youngblood Chief Environmental Projects Branch 3 Division of Reactor Licensing

u. s. Nuclear Regulatory ComIIiission Washington, D. c. 20555

Dear Mr. Youngblood:

ENVIRONMENTAL TECHNICAL SPECIFICATIONS NO. 1 AND 2 UNITS SALEM NUCLEAR GENERATI1~N DOCKET NOS. 50-272 ~~-

We are enclosing for your review a revised copy of Sect~on 2.1 of the Salem Environmental Technical Specifications (ETS) as requested in your letter of May 28, 1975. Also enclosed is a copy of Table 3o2-2 as per your request.

With regard to your request for a definition for "Designated :tvlixing Zone",

we believe this definition is unnecessary, since the term is not used in the ETS.

The additional information requested regarding bathyrnetric surveys will be provided in the near futureo All of the above information will also be reflected in Amendment 2 to the ETS, to be submitted in the near futureo A comparison table of condenser discharge isotherms for 13o6°F and 16o5°F ~T's is enclosed in reply to a telephone request by Mr. F. Jo Miraglia of your staff.

Very truly yours,

, *u .

~ L__ /)t ,,,1~- /Z,

/c.ft1//

R. L. Mittl General Manager - Projects Engineering and Construction Department The Ene~gy People

2.0 LIMITING CONDITIONS. FOR OPERATION*

2 .1 TIIERMAL MAXIMUM h.T ACROSS CONDENSER Objective To limit thermal stress to the aq~atic ecosystem by limiting the maximum h.T across the condenser during operation.

• Specification

1. The maximum h.T across the condenser shall not exceed 16.5°F duri~g normal operation with all six circulating water pumps operating.

2. The ma~:i.mum /j,T across the condenser shall not exceed 27 .fF in the event the system is operating with as many as one circulating water pump per condenser shell out of service at any given time.

3. In the event Specification 2.1.1.1 or 2.1.1.2 are exceeded, no corrective action shall be required other than operating within the limits of Specification 2.1.2.

Monitoring Requirement The temperature differential across the condenser shall be monitored every hour utilizing the computer printout of the intake and discharge temperature measurements. The intake temperature is measured at each of the two inlets to each condenser shell. The discharge temperature is measured at a

• point downstruam of the condenser in each of the* two 84-inch

'SNGS - ETS 2.1-1 Am*endment 2 Units 1 & 2

e.

ID discharge lines from each condenser shell. The range of 0 0 this instrumentation is 0 150 F and the accuracy is + 0.5 F

• If the plant computer is out of service, the intake and dis-charge temperatures shall be monitored every two hours utiliz-ing local reading instrumentation until the plant computer ~s returned to service.

Bases Organisms entrained in the cooling water will be subjected to a sudden temperature rise in the condenser. This exposure and its effects are limited to, and by, . entrainment time in the cooling system. During normal operation (Specification 1),

this period of entrainment will be l.ess than 4 minutes. Under conditions covered in Specification 2, entrainment time will be less than 8 minutes for 1/5 of total cooling flow; 4/5 of total flow will be passed through the system within 4 minutes.

This time-temperature exposure will effect minimum impact on

. (1) (2) entrained organisms. Studies by Hoss, et. al., Schubel ,

and Ichthyological Associates (unpublished) show total surviva.1 aniong potentially entrainable organisms which were exposed for 0

10 minutes to a liT of 16.5 F, and relatively high survival 0

after similar e..~posure. to a liT of 27. 5 F. Due to _handl1:D:g problems the Cynoscion regalis (Weakfish) and the Anchoa Mitchilli.(Bay Anchovy) were not included in these. tests.

However, the overall impact on all species is not expected to be- significant for the following reasons*:

SNGS - ETS Units 1 & 2 2.1-2 Amendment 2

e.

1. Infrequency of the occurrence-of the 27.5°F ti.T as indicated'in the bases for Specification 2.1.2

2. Comparatively small amount of water utilized for cooling purposes compared to tidal flow (on the order of *1%).

3. With respect to weak.fish:

(a). Most are. spawned at least 15 miles *south of Artificial Island. Relatively few of entrainable size (< 50 mm total length) have been taken by Ichthyological Associates, Inc. in the Artificial Island region.

(b) The vicinity of. Artificial Island is the northern perimeter of a large nursery_area which extends south through the Delaware Bay.

With respect to bay anchovy:

(a) Large ~numbers occur throughout the Delaware Bay estuary.

(b) The majority of the population will not be exposed to the Salem intake.

SNGS - ETS Units 1 & 2 2.1-3 Amendment 2

References

i. Hoss, Do E., W. F. Hettler, Jr. and Lo *co Castano 1973.

Effects of thermal shock on larval estuarine fish--Eco-logical implications with respect to-entrainment in power plant cooling systems. In the Proceedings of the Sywposium on the Early Life History of Fish, Oban, *Scotland.

2o Shubel, J. R. 1975. Some comments on the thermal effects of power plants on fish eggs and larvae. In: Fisheries and Energy Production - A Symposium. Saul B. Saila (ed.}

D. Co Heath and Co

• 2.1.2 .MAXIMUM DISCHARGE TEMPERATURE Objective To limit thermal stress to the aquatic ecosystem by limiting the plant discharge water temperature.

Spec i f ica t ion

1. The maximum condenser discharge water temperature shall

. 0 not exceed 104 F for more than two consecutive hours with all six circulating water pumps in operation.

2. The maximum condenser discharge water temperature shall 0

not exceed 115 F for more than eight consecutive hours in the event the system is operating with as many as one circulating water pump per condenser shell out of service at any given time.

3o In the event specifications 2.1.2.1 or 2.lo2.2 are exceeded corrective action shall be taken to reduce the condenser discharge water temperature to within specification. Such SNGS - ETS Units 1 & 2 2.1-4 Amendment 2

corrective action could include cleaning condenser water boxes or reduction of unit power level, unless an emergency need for power exists, Monitoring Requirement Discharge temperature shall be monitored every hour utilizing the average of the computer printout of th~ discharge tempera-ture measurements. The discharge temperature is measured at a point downstream of the condenser in each of the two 84-inch ID discharge lines from each condenser shell. The range of this instrumentation is 0-150°F and accuracy is + 0.5°F.

If the plant computer is out.of service, the discharge temperature sha~l be monitored every two hours utilizing local reading instrumentation until the plant computer is returned to service.

Bases Ichthyological Associates (IA) studies perfprmed from June 1968 through December 1973, show 25 records of river tempera-o tures > 84 *F. Twenty-one of these records were at river surface and only one was at night. From 1970 through 1973 the U. S. Geological Survey tepiperature sensor at Reedy 0

Island recorded temperatures.:::_ 84 F on o~ly four dates. The earliest calendar date of record by.IA was June 26 (in 1969);

the latest was September 7 (in 1973).

During this period for potentially high temperatures, phyto-plankton, zooplankton, and ichthyoplankton have been annually collected. These non-motile organisms encountering the plume can experi~~ce mortality only if lethal time~temperature

.*:/'?" . ~:

SNGS - ETS Units 1 & 2 2.1-5 Amendment 2

e e histories are experienced. At the predicted velocity range, effects on drifting organisms and passive life stages of

~

motile species are minimized by short exposure time. Effects on sessile benthos in the near field (outside the area of maximum temperature and velocity and scouring) will be negligible since the plume will be primaril~ a surface phenonmenon.

Motile organisms encountering a thermal plume will either (1) pass through it, (2) prefer it over ambient conditions, or (3) avoid it. Avoidance can be considered detrimental in that its result is similar to a loss.of potential habitat.

However, only a minor portion of the total available habitat will be made unavailable by the teuiperature-velocit:: pattern.

Delaware River organisms .will not be isol_ated from environ-mental conditions presently available to them. The discharge velocity will exclude most motile organisms from the maximum temperatures.

For example, when the river temperature is 86°F and the con-o denser fiT is 16.5 F, the water surface area which would be at a temperature of 92°F or greater will not exceed 1.17 X 10 6

2 ft (27 acres). This maximum area would occur only during I

the worst tidal condition (tidal hour O). Estimated discharge plume areas for different times during the tidal cycle are 0

listed below for a condenser fiT of 16.5 F.

Isotherm Area

• Tidal Hour 40F 5°F 0 11.9 4.56 1-1/2 1.91 3 3.24 4-1/2 5.83 2.11 6 6.52 3.58 SNGS - ETS-Units 1 & 2 2.1-6 Amendment 2

e.

Isotherm Area

• Tidal Hour 4°F 5°F 9 8.83 10-1/2 12.25 0 .

Should the condenser 1H reach 27. 5 F, higher temperatures in the plume would be expected, but for-only a very short duration and relatively infrequently. This occurrence would be anti-cipat~d during heavy run-off from storms which carries large deposits of detritus (vegetation) and other debris which may clog the intake screens. This may occur once or twice a year, usually during the spring.* Normal operation would be resumed as soon as the screens are cleaned.

Ecological effects due to a condenser L1T of 27.5°F would be restricted to an enlarged isotherm *piume area (compared to the 16.5°F i1T case) that would be denied as a habitat for most of the species which occur at Artificial Island.

References

1. Salem FSAR, Appendix A.4, Dispersion and Cooling of Water Heat Released into the Delaware River Estuary, Pritchard-Carpenter, Consultants, July, 1968.

2.1.3 RATE OF CHANGE OF DISCHARGE TEMPERATURE Objective To minimize thermal stress to the aquatic environment due to sudden changes in water temperature.

• Estimates derived from calculations for mixing zone areas as developed by the NRC Regulatory Staff Final Environmental Statement, Salem Nuclear Generatfng Station, April, 1973.

SNGS - ETS Units 1 & 2 2.1-7 Amendment 2

Specification 1.

The rate of change of discharge temperature shall not exceed 8°F per hour during normal plant shutdowns.

If this specification is exceeded, the rate of reduction of plant power level shall be reduced such that the rate of change of discharge temperature is within specification.

This limitation may be exceeded for brief periods as necessary to protect plant equipment and for certain safeguard operations which cannot be _limited or negated by plant operation. These safeguard operations include automatic plant trips and compliance with the Safety Technical Specifications.

2. Both units shall not be intentionally shut down concurrently during the period of November through April. This speci-fication is not applicable if shutdown is required to protect the health and safety of the public or for compliance with the Safety Technical Specifications.

Monitoring Requirement Same as Specification 2.1.2, except that the discharge tempera-ture shall be monitored every 15 minutes during power reductions of greater than 25% of full powero Bases All organisms have lower lethal temperatures. In temperate latitudes, such lethal temperatures are generally reached only when the ambient water temperature approaches freezing. The phenomenon of "cold shock" has been found to be most severe SNGS ETS Unit 1 & 2 2.1-8 Amendment 2

e.

. 0 during th~ period of low ambient water temperatures (::._ 40 F).

The likelihood of reaching lower lethal temperatures can be minimized by maintaining a heated discharge during the period 0

when temperatures are ::._ 40 F. The potential fo.r co~d shock and its effects will be minimized since the thermal effluent from one unit will compensate for possible shutdown of the other unit.

SHGS-ETS ..*:-'

Units 1 & 2 2.1-9 Amendment 2

-e TABLE J.2-2 Exposure Units Pathway Analysis x.1 . (1 I. Airborne A. Air Particulate Gross beta 75 91 l0- 15 µCi/ml Sr 89 Note 1 Sr 90 Note 1 yemitters Note 2 Be 7 54 21 l0- 15µCi/ml Cs 137 2.9 2.8 l0- 15µCi/ml Ce 144 25.0 32.6 l0- 15µCi/ml Zr 95 3.5 .4.1 l0- 15µCi/ml B. Air Iodine I-131 Note 3 II. Soil Sr 90 5.2 3.3 10- 7 µCi/ml yemitter. Note 1 and Note *2 III. Direct Gannna Dose 4.4 .6 mrad/std mo.

TLD's (Quarterly)

IV. Water H-3 2.4 1.4 10-7 µCi/ml A. Surface Sr 89 Note 2 Sr 90 Note 2 (yf:Illitters) Note 2 K-40 5.4 4.1 10- 9 µCi/ml

e.

TABLE 3.2-2 (Con' t)

Exposure Pathway Analysis xi Units B. Ground H-3 Note 2 (yemitters) Note_ 2 K-40 8.2 4.3 10-SµCi/ml

c. Drinking H-3 1.8 .9 10-lµCi/ml Sr 89 Note 1 (raw'or treated Sr 90 10.6. 5.3 10-lOµci/ml water)

Gross beta 4.3 2. 6 . l0- 9µCi/ml yemitters Note 2

v. Aquatic Benthos Sr 89 Note 1 Sr 90 Note -1 (yemitters) Note 1 VI. .Ingestion

- A. 11ilk I-131 Note* 3 Sr 89 Note 2 Sr 90 4.2 .2.5 l0- 9µcUml (yemitter*s) Note 2 Cs 137 Note 2 . l0- 6µCi/ml B. Fish (yemitters) Note 1

c. Crabs (yemitters) Note 'l D. Fruits or (Yemitters) Note 1 Vegetables I-131 Note 3 E. Grune (yemitters) Note 1

Table 3.2-2 (Co~'t)

Note 1: Insufficient data Note 2: Several means and deviations could not" *be calculated because of abundancy of MDL values.

Note 3: Because most values were :MDL means and deviations could not be determined, however the following review points have been established:

I-131 in milk Review point = 2.4 pCi/l I-131 in leafy vegetables Rev1ew point 110 pCi/.l I-131 in air Review point .5 pCi/m3

.~

• __._ **-- -***~'

e.

COMPARISON TABLE OF 4°, 5° AND 6°F ISOTHERM-AREAS 13.60F vs 16.SOF CONDENSER ll.T

13. 6°F ll.T( 2_) 16.S°F ll.T( 3 ) z 2 Isotherm Area, ft Isotherm Area, ft Tidal Hour 6.06. 2.32 0.59 11.9 4.56 1.17 0

1-1/2 0.97 1.91 3 1.65 3.24 2.97 1.07 5.83 2.11 4-1/2 3.32 1.82 6.52 3.58 6

7-1/2 1.37 2.69 9 o.4s 0.88 10-1/2 0.62 1.23 Notes: 1) Two units operating, full power

2) Based on Carpenter estimates, FSAR, Appendix A.4.

3) Values extrapolated from Carpenter estimates in Note 2.