ML20055E304

Safety Evaluation Supporting Util 871223 & 880111 Proposed Changes to Tech Specs,Including Reducing Lower Limits of Detection for Liquid Radioactive Effluents

ML20055E304
Person / Time
Site:	San Onofre, Rancho Seco
Issue date:	02/12/1988
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML20055C206	List: 05000206/LER-1989-006, :on 890320,since Regenerant Holdup Tank a Release Lasted Approx 4 H & 25 Minutes & Required Flow Estimate Not Performed,Release Constituted Tech Spec Violation.Caused by Personnel Error ML20055C205 ML20055E282 ML20055E293 ML20055E298 ML20055E301 ML20055E304 ML20055E305 ML20055E311 ML20055E315 ML20055E321 ML20055E334 ML20055E345 ML20055E367 ML20055E375 ML20055E380 ML20055E399 ML20055E401 ML20055E491
References
NUDOCS 9007110274
Download: ML20055E304 (4)

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ENCLOSURE.1 l

SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION i

TECHNICAL SPECIFICATIONS CHANGE-F0P.

RANCHO SECO N') CLEAR GENERATING STATION

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DOCKET NO. 50-312 i

1.

INTRODUCTION.

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. By! letters dated l December = 23, 1987 and January 11, 1988' the Sacramento.

o Municipal Utility District proposed changes to the Technical Specifica-1

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tions-- (P. A. :155 Rev. 2).-

Those-changes would:

(1).. reduce -. the ; lower limits of: detection for. liquid radioactive effluents, (2) change require-K

, ments to match changes in the effluent systems, (3) clarify-certain -

existing requirements and (4) improve consistency -with =the Standard 1

. Technical Specifications.

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'2.

EVALOATION.

J Thefexisting, Technical Specifications ' require the controli of' liquid

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effluents,-including meeting the dose design objectives cf. Appendix I to -

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10'CFR Part 50.

Some changes. were necessitated by equipment changes. and other; changes were indicated by past problems. 'To meet these neeris and h other, improvements the licensee proposed a major revision. of the

.uent control: parts of the Technical Specifications.

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The proposed changes in the. lower limits of detection (LLD) for liquid efflu-ents are important to coping with the special problems posed by the dry site e

at Ranch Seco.

Specifically, the LLD for Cs-134. C5-137 and other principal gamma emitters are being reduced by a factor of 100, to 4 pC1/L. This ensures that releases would be detected if they were capable of producing doses that would be a small fraction of the Appendix 2 dose criteria.

Thus these LLD 4

values are acceptable.

The staff has reviewed the proposed changes to the Technical Specifications and concludedthat,as,indicatedbythelicensee,thechangesareeither(1)clari-

fications-_ofexistingrequirements,(2)revisiontoachievegreaterconsistence with thel Standard Technical Specifications, (3) corrections required by modifications L of ' the equipment,- or. (4) - requirements made more stringent' to accommodate' the special conditions at Ranch Seco, it is concluded that the proposed changes are consistent with, the intent-of the Standard Technical

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Specifications and,therefore are accepted.

'3.

ENVIRONMENTAL CONSIDERATION We have determined that the. issuance of the proposed amendment to. the Technical Specifications appended to Facility Operating License No. DPR-54 for Ranch Seco would not authorize a significant change in types, or a

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significant increase in the amount of effluents or in the authorized power level, and that. the amendment will not result in any significant environ-mental impact.

Having made these determinations, we have further con-m

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cluded that the amendments involve an action which is insignificant-from the standpoint of environmental impact and, pursuant to-10 CFR Part 50.F(d)(4). that an environmental impact appraisal need not to be prepared in connection with the issuance of this amendment.

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CONCLUSION' 3

[:L We have - concluded ' based on the considerations. discussed above. that:

(1) this amendment will not. involve a significant increase in the prob-1

- ability.or. consequences -- of accidents previously considered.: does not

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involve -a; significant' hazards consideration; -(2) there is reasonable assurance'that the health-and safety of the public willinot be endangered'

.byfoperationintheproposedmanner;(3)suchactivitieswillbe' conducted-in: compliance with the Commission's regulations and the issuance: of this amendmentJwill not be inimical to the common. defense and security;or to?

the health and safety of the public.

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T ENCLO$URE 2

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SALP !NPUT FROM THE RADIATION PROTECTION BRANCH I

FOR THE RANCHO $ECO t

TECHNICAL $PECIFICATIONS CHANGE $

FUNCTIONAL AREA:

LICENSING ACTIVITIES 1.

Management Involvement in Assuring Quality Category:

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i Management became deeply involved in this issue but that involvement came late; lack of early participation worsened the problems.

2.

Approach to Resolution of Technical Issues from a safety Standpoint The approach was satisfactory but considerable redirection by the staff was required.

Category:

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3.

Response to NRC Initin'ives:

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The responses to the NRC questions were adequate.

Category:

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Enforcement History:

f Category: N/A 6.

Reportable Events:

Category: N/A 6.

Staffing I

Category: N/A L

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Training:

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. Category: N/A 8.

Overall Rating for Licensing Activity Function Area:

Category:

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