ML20150C853

Safety Evaluation Re Employee Concern Element Rept 22911, Insufficient RMS Detection Equipment

ML20150C853
Person / Time
Site:	Sequoyah
Issue date:	03/11/1988
From:	NRC OFFICE OF SPECIAL PROJECTS
To:
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References
NUDOCS 8803220349
Download: ML20150C853 (2)

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SAFETY EVALUATION REPORT BY OFFICE OF SPECIAL PROJECTS EMPLOYEE CONCERN ELEMENL REPCRT 22911-

"INSUFFICIENT RMS DETECTION iOUIPMENT" TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR POWER PLANT, UNITS 1 AND 2 DOCKET N05. 50-327/328 I.

SUBJECT Category:

Engineering Subcategory:

Radiation Monitoring System (22900)

Element:

Insufficient RMS Detection Eouipment (22911)

Employee Concern:

IN-85-144-001 The basis for Element Report 22911 Revision 2, prepared January 8, 1987, is an employee concern stating "There is not enough radiation detection equipment in the plant; specifically on the radioactive process piping systems in Unit 1 and in the shield building vent stack for Unit 1. Shield building sent stack needs more radiation monitoring equipment to meet federal guidelines."

II.

SUMMARY

OF ISSUE In this concern, an employee allegeo that the amount of radiation monitoring i

equipment provided at Sequoyah was not sufficient to meet federal guidelines.

The quantity of radiation monitoring equipment was deemed to be insufficient, i

and the monitoring of process piping and the shield building vent stack was also stated to be inadequate.

The TVA employee concern special program (ECSP) report evaluated the process radiation monitoring and area radiatien monitoring equipment at Sequoyah, and compared these systems to comparable radiation monitoring systems installed at San Onofre, Palo Verde, and SNUPPS (i.e.,

Callaway and Wolf Creek).

Federal regulations governing the monitoring of radioactive effluents were also evaluated in this report.

TVA has also reviewed the NRC SER and ccnfirmed the SER finding by reviewing it against the

.j current federal guidelines, compared the FSAR with current SQN design documents and an independent assessment of the current design document against the federal guidelines.

The TVA ECSP report concluded that the concern was not valid as the Sequoyah radiation monitoring systems meet all applicable federal 8803220349 880311 I

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guidelines and are comparable to systems used at other operating plants.

Corrective action involving updating of the FSAR was identified from this review.

III. EVALUATION NRC and its consultant SAIC, reviewed the employee concern and the TVA find-ings.

The radiation monitoring evaluation prepared by TVA ECSP was complete and comprehensive.

The report demonstrated that Sequoyah has a comparable level of equipment relative to three other plants, and that the installed equipment is adequate to meet applicable federal guidelines.

The conclusion that the concern was irvalid is correct.

The schedule for the corrective action involving FSAR updating is reasonable.

IV.

CONCLUSION Based on this, the NRC staff concludes that the concern regarding RMS is not valid and that TVA's investigation, evaluation and corrective action plan (FSAR update) described in EN-22911, Rev. 2, are adequate.

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