ML20234B267

Forwards Criteria That Will Be Used in Determining Operability of Facility Intrusion Detection Sys,Per Licensing Condition Requiring Sys to Be Operable Prior to Initial Criticality

ML20234B267
Person / Time
Site:	South Texas
Issue date:	09/16/1987
From:	Gagliardo J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:	Goldberg J HOUSTON LIGHTING & POWER CO.
References
NUDOCS 8709180336
Download: ML20234B267 (4)

Text

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SEP l 61987 In Reply Refer To:

Dockets: 50-498 Houston Lighting & Power Company.

ATTN: J. H. Goldberg, Group Vice President, Nuclear P. 0. Box 1700 Houston, Texas 77001 Gentlemen:

Facility Operating License NPF-71 for the South Texis Project, Unit 1 contains in Section F a licensing condition which states tha; " prior to initial criticality, the intrusion detection system shall be proven operable to the staff's satisfaction under the criteria and reliability standards set forth in Regulatory Guide 5.44, Revision 2." The criteria identified in the enclosure to this letter will be used by Region IV in making a determination of the operability of the South Texas Project Intrusion Detection System.

This material has been discussed with Houston Lighting and Power Company.

personnel, and they have expressed understanding of the requirements of these criteria. If you have any questions regarding this information, please contact Mr. Larry Yandell at (817) 860-8108.

Sincerely,

" Original Signed by:

R. E. Hall" J. E. Gagliardo, Chief Reactor Projects 3 ranch

Enclosure:

As stated cc w/ enclosure: (see next page)

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Houston Lighting & Power Company Houston Lighting & Power Company ATTH: M. Wisenberg, Manager, Nuclear Licensing P. O. Box 1700 Houston, Texas 77001 Houston Lighting & Power Company ATTN: Gerald E. Vaughn, Vice President Nuclear Operations P. O. Box 1700 Houston, Texas 77001 Texas Radiation Control Program Director bec:

DMB(IE01)

V. Stello, ED0 H. Thompson, NMSS J. Calvo, NRR R. Martin, RIV J. Callan, RIV R. Bangart, RIV )

R. Hall, RIV L. Yandell, RIV J. Gagliardo, RIV T. Martin, E00 D. Crutchfield, NRR F. Shroeder, NRR P. Kadambi, NRR W. Fisher, RIV T. Westerman, RIV G. Constable, RIV D. Carpenter, SRI-0PS for STP C. Johnson, SRI-CONST for STP H. Bundy, RIV R. Taylor, RIV  !

R. Pirfo, 0GC f Security Inspectors, RPSB l RPSB l RSB l RIV File 1

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' PERIMETER' INTRUSION DETECTION SYSTEM (IDS) CRITERIA c {

-I. DEFINITIONS-FARNAR = Combined False Alarm and Nuisance Alarm Rate.

FAR = False Alarm Rate:

l Alarms which have been generated without an apparent cause.

L* Investigation discloses no evidence of-a valid alarm condition F

including tampering, no. nuisance alarm conditions, and no

equipment malfunction.  ;

NAR ( Nuisance Alarm Rate:

Alarms which have been generated by an identified'cause that does not- l represent a safeguards threat. 4 l

Environmental causes such-as heavy rain, high winds, and i electromagneticinterference_(lightning)areexamplesofIDSnuisance alarms. j Mechanical factors causing IDS alarms such as animals, b' lowing trash and moving vehicle traffic near IDS segments are examples of IDS- I nuisance alarms.

II. Response Criteria (a) All alarms require appropriate action to determine the cause and to maintain the integrity of site security.

(b) Alarms generated during tests for maintenance activities need not be res)onded to when the CAS and SAS have prior knowledge and consent of suc1 activity.

III. FARNAR CRITERIA No more than four (4) combined false and nuisance alarms per cardinal hour '

per IDS zone.

IV. Detection Criteria (ref. Reg. Guide 5.44, Section C.2.b)

Demonstrate the capability to detect an intruder with at least 90%

probability in each IDS zone of the isolation zone, with 95% confidence, under the conditions stated in the performance criteria of each type of alarm system as stated in Reg. Guide 5.44 An acceptable method for demonstrating this capability is given in the detection probability testing section of Appendix A to Reg. Guide 5.44.

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V. SYSTEM AVAILABILITY CRITERIA (a) Each single IDS zone of the total IDS shall be operating within the FARNAR criteria ninety five (95%) of the time in cardinal hour increments for 30 continuous days: that is, inoperative no more than 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> per zone for 30 days.

(b) All zones of the total IDS shall be operating within the FARNAR criteria ninety five (95%) of the time for the same continuous 30 day period: that is, inoperative no more than 1188 hours0.0138 days <br />0.33 hours <br />0.00196 weeks <br />4.52034e-4 months <br /> for 30 days based on number of zones x number of hours in 30 days x .05.

VI. SYSTEM AVAILABILITY-ACCOUNTING FOR IN0 PERATIVE TIME.

(a) If the FARNAR criteria for any zone is exceeded, that zone shall be counted as inoperable for that cardinal hour. This shall not include routine required testing or testing after maintenance.

(b) If the total system or individual zones are " accessed" due to excessive FARNAR rates or are not reset, that cardinal hour is an ,

inoperative hour.

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