ML20136G074
| ML20136G074 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 09/28/1993 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20136C539 | List:
|
| References | |
| FOIA-96-485 NUDOCS 9703170189 | |
| Download: ML20136G074 (5) | |
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-i Enclosure 4
SAFETY EVALUATION RY THE RADIATION PROTECTION BRANCH OFFICE OF NULLEAR REACTC8 REGULAT,[QM f
i FLORIDA POWER & LIGHT COMPANY j
ST. LUCIE PLANT. UNITS 1 AND 2 DOCKET NOS. 50-335 AND 50-389 1.0 Introduction i
By letter dated July 23, 1993 Florida Power & Light Company (the licensee),
submitted preposed changes to the St. Lucie Plant, Units 1 and 2 Technical Specifications (TS) in support of its plan te implement the revised 10 CFR t
Part 20.
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2.0 Evaluation l
The licensee has revised the TS to include wording that is consistent with the revised 10 CFR Part 20, Standards for Protection Aaainst Radiation, and will j
retain the same overall level of effluent control required to meet the design objectives of Appendix I to 10 CFR Part 50.
The proposed TS changes and evaluations follow:
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Section 1.0 DEFINITIONS 1
The licensee has proposed to revise the. definitions of MEMBER (S) 0F THE PUBLIC, SITE BOUNDARY, and UNRESTRICTED AREA to conform to the definitions of these terms used in 10 CFR 20.1003.
These changes are administrative in nature to incorporate the corresponding revised 10 CFR Part 20 definitions and are acceptable.
2.
Figure 5.1-1 SITE AREA MAP The licensee has proposed to delete Note 3), which lists areas that are i
considered UNRESTRICTED AREAS. The licensee now considers the areas to be controlled areas as defined in 10 CFR 20.1003. Therefore the note is unnecesskry since all areas within the licensee's property line are controlled.
The change is administrative in nature and is acceptable.
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3.
TS 6.8.4.f Radioactive Effluent Controls Procram The licensee has proposed to revise item 2 of this TS which specifies the limitations on the concentrations of radioactive material released in liquid effluents to UNRESTRICTED AREAS. The licensee has proposed that the TS be revised to allow " ten times the concentration values in 10 CFR 20.1001 - 20.2401, Appendix B, Table 2, Column 2."
i The licensee has proposed this change in order to retain operational flexibility consistent with Appendix I to 10 CFR Part 50, concurrent with the implementation of the revised 10 CFR Part 20.
The current requirements for the content of the licensee's TS concerning radioactive effluents are contained in 10. CFR 50.36a.
requires licensees to maintain control over radioactive material in gaseous and liquid effluents to unrestricted areas, produced during normal reactor operations, to levels that are as low as reasonab,y achievable (ALARA). For power reactors, Appendix I to 10 CFR Part 50 cor.tains the numerical guidance to meet the ALARA requirement. The dose values specified in Appendix I of 10 CFR Part 50 are small percentages i
j of the implicit limits in 10 CFR 20.106 and the explicit limits in 10 CFR 20.1301. As secondary controls, the instantaneous dose rates required by this TS were chosen by the staff to help maintain annual average releases of radioactive material in gaseous and liquid effluents to within the dose values specified in Appendix I of 10 CFR Part 50.
For the purposes of this TS,10 CFR Part 20 is used as a source of reference values only. These TS requirements allow operational flexibility, compatible with considerations of health and safety, which may temporarily result in release rates which, if continued for the i
calendar quarter, would result in radiation doses higher than specified in Appendix I of 10 CFR Part 50. However, these releases are within the implicit limits in 10 CFR 20.106 and the explicit limits in 10 CFR 20.1302 which references Appendix B Table II concentrations. These referenced concentrations in the old 10 CFR Part 20 are specific values which relate to an annual dose of 500 mram. The liquid effluent radioactive effluent concentration limits given in Appendix B, Table 2, Column 2 to 10 CFR 20.1001 - 20.2401 are based on an annual dose of 50 arem total effective dose equivalent. Since an instantaneous release concentration corresponding to a dose rate of 500 mrem / year has been acceptable as a TS limit for liquid effluents, which applies at all times to assure that the values in Appendix I of 10 CFR Part 50 are not likely to be exceeded, it is not necessary to reduce this limit by a factor of ten.
The licensee states that operational history at the St. Lucie Plant has demonstrated that the use of the concentration values associated with 10 CFR 20.106 as TS limits has resulted in calculated maximum individual doses to a member of the public that are small percentages of the values given in Appendix ! to 10 CFR Part 50. Therefore, the use of effluent 1
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1 concentration values that are ten times those listed in Appendix B, Table 2, Column 2 to 10 CFR 20.1001 - 20.2401 will not have a negative impact on the ability to continue to operate within the design objectives in Appendix I to 10 CFR Part 50 and 40 CFR Part 190.
Based on the above, it is acceptable that the instantaneous limits associated with the liquid release rate TS are based on ten times the effluent concentration values given in Appendix B, Table 2, Column 2 to 10 CFR 20.1001 - 20.2401, to apply at all times.
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TS 6.8.4.f Radioactive Effluent Controls Proaram I
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The licensee has proposed to revise item 3 of this TS to replace the reference to "10 CFR 20.106" with "10 CFR 20.1302".
4 This change is administrative in nature to incorporate the corresponding revised 10.CFR Part 20 section number and is acceptable.
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TS 6.8.4.f Radioactive Effluent Controls Proaram l
The licensee has proposed to revise item 7 of this TS which specifies the limitations on the concentrations of radioactive material released in gaseous effluents. The licensee has proposed that the TS be revised to read as follows:
" Limitations on the dose rate resulting from radioactive material released in gaseous effluents to areas at or beyond the SITE BOUNDARY 4
shall be limited to the following:
a)
For noble gases: Less than or equal to 500 mrem /yr to the total body and less than or equal to 3000 mrem /yr to the skin, and
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For Iodine-131, for Iodine-133, for tritium, and for all radionuclides in particulate form with half-lives greater than 8 days: Less than or equal to 1500 mrem /yr to any organ;"
The licensee has proposed this change in order to retain operational flexibility consistent with 10 CFR Part 50, Appendix I, concurrent with the implementation of the revi:;ed 10 CFR Part 20.
The current requirements for the content of the licensee's TS concerning radioactive effluents are contained in 10 CFR 50.36a. 10 CFR 50.36a requires licensees to maintain control over radioactive material in gaseous and liquid effluents to unrestricted areas, produced during normal reactor operations, to levels that are as low as reasonably
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' I achievable (ALARA). For power reactors, Appendix I to 10 CFR Part 50 contains the numerical guidance to meet the ALARA requirement. The dose l
1 values specified in Appendix I of 10 CFR Part 50 are small percentages i
of the implicit limits in 10 CFR 20.106 and the explicit limits in 10 1
CFR 20.1301. As secondary controls, the instantaneous dose rates i
j, required by this specification were chosen by the staff to help maintain j
annual average releases of radioactive material in gaseous and liquid i
j effluents to within the dose values specified in Appendix I of 10 CFR a
Part 50. For purpose of the bases of this TS, 10 CFR Part 20 is used as t
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a source of reference values only. These TS requirements allow i
i operational flexibility, compatible with considerations of health and j
safety, which may temporarily result in release rates which, if i
continued for the calendar quarter, would result in radiation doses higher than specified in Appendix I of 10 CFR Part 50.= However, these.
l releases are within the limits specified in 10 CFR 20.106 (10 CFR 20.1302).
This specification, which is based on guidance contained in NUREG-0133, is acceptable' as a TS limit for gaseous effluents, which applies at all times as an assurance that the values in Appendix I of 10 CFR Part 50 j
are not likely to'be exceeded.
l The licensee states that the proposed TS change does not revise the dose
} i rate' limits as implemented by the St. Lucie Offsite Dose Calculation i
Manual. Therefore, the use of the proposed TS will not have a negative i
impact on the ability to continue to operate within the design objectives in Appendix I of 10 CFR Part 50.
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. Based on the above, it is acceptable that the gaseous release rate TS for radioactive material be based on the stated dose rates.
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TS 6.g.1.5 ANNUAL REPORTS The licensee has proposed to revise this TS to add the words "for whom monitoring was required" and " Annual Deep Dose Equivalent", replace i
"whole body dose" with " Deep Dose Equivalent", and replace the reference i
to "20.407" with "20.2206."
The proposed changes are administrative in nature and provide clarification of the TS consistent with the requirements of the revised 3
Part 20. The proposed changes are acceptable.
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TS 6.12.1 HIGH RADIATION AREA The licensee has proposed to revise this TS to replace the reference to
" 20;203(c)(2)" with "20.1601(a)", and add the words " measured at a distance of 30 cm (12 in)"
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j The proposed changes are administrative in nature and consistent with t
the revised Pari. 20. The proposed changes are acceptable.
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TS 6.12.2 HIGH RADIATION AREA f
The licensee has proposed to replace the words "such that a major portion of the body could receive in one hour a dose greater than 1000 4
mres" with "in excess of 1000 mres/hr at 30 cm (12 in) and less than 500 rads /hr at I meter." The licerisee also proposes to replace the words j
"such that a major por}, ion of the body could receive in one hour a dose in excess of 1000 aren " with "in excess of 1000 mres/hr at 30 cm (12 4
in) and less than 500 The licensee will also delete the footnote ",, rads /hr at'_1 meter."
Measurement made at 18 inches from the source of
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radioactivity."
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The proposed changes are consistent with the requirements of the revised
,j Part 20 and are acceptable, i>
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TS 6.14 0FFSITE DOSE CALCULATION MANUAL I
The licensee has proposed to revise this TS.to replace the reference to r < -
"20.106" with "20.1302."
This change is administrative in nature to incorporate the corresponding revised 10 CFR Part 20 section number and is acceptable.
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