ML20236R532

Responds to NRC Re Issues Raised in P Borchmann 980723 & 28 Ltrs Re Offsite Emergency Preparedness.Response to Three Issues Raised by Borchmann Provided,Based on Latest Evacuation Time Study Dtd Jul 1997

ML20236R532
Person / Time
Site:	San Onofre
Issue date:	05/08/1998
From:	Husar I Federal Emergency Management Agency
To:	Zalcman B NRC (Affiliation Not Assigned)
Shared Package
ML20236R513	List: DD-98-05, Notice of Issuance of Director'S Decision DD-98-05 Denying P Borchmann 970623 Petition to Extend Outages Until Outstanding Public Health & Safety Concerns Fully Resolved ML20236R532
References
2.206, DD-98-05, DD-98-5, NUDOCS 9807220101
Download: ML20236R532 (2)

Text

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, Federal Emergency Management Agencycge7eg Washington, D.C. 20472 USNRC h  % JUN -5 P5 :09 Mr.Barry Zaleman E phl[ h- y Acting Chief, Emergency 7,we n ass & ADJUDXF E ' Mp l Environmental Health Physics Section ]

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory cammi== ion Washmgton, DC 20555-0001

Dear Mr. Zaleman:

This letter is in response to your Apnl 1,1998, loner concerning issues raised by Ms.

Patricia Borh==nn. of Vista, Califomia, in her letters Sted June 23, and June 28, 1997, regarding offaite emergencv preparedness measures an the San Onofre Nuclear Generating Station (SONGS),Irx:sted in San Clemente, Californic Specifically, Ms.

Borchmann alleges that seriou1 evacuation flaws exist in the SONOS evacuation plans for both San Diego and Orangi Counties. She indicates that the Evacuation and Traffic

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Capacity Analysis performed fu SONOS underestimated the actual number of vehicles projected to be used in an emergeccy evacuation, resulting in the Evacuation Time Estimate (ETE) studies being flawed.

/ The latest evacuation time study is dated July 1997, an update from the 1993 verson,

\ and was prepared by Wilbur Smith Associates, and reviewed for tecin.ical accuracy by Thomas Urbanik II, Professional F= rim. Mr. Urbamk reviewed this study fbm the perspec% of the three offsite emergency preparedness issues raised by Ms.

Borrhmane Those issues are listed below, along with Mr. U banik's evaluation of the study.

Issue 1. The number of evacuating vehicles is underad==W including the assumption of only one vehicle per household.

Although the use of cne vehicle per household is often used in evacuation time estimate studies, the San Onofre ETE uses a higher number of vehicles, which is based on the particular evacuation scenario. Different numbers of vehicles are used in daytime and nighttune scenarios to reflect different conditions. All the scenarios use more than one vehicle per household. These higher numbers of vehicles is believed to better ,ym the conditions at San Onofre. 'Ibc methodology used to generate this number of evacuatmg vehicles remnanahly reflects the number ofpotentially eva~dng vehicles.

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( 9807220101 980605 PDR ADOCK 05000361 Q PDR

y 2026463508 PTEXRG PAGE 83

., es/11/199( 09:13 Issue 2. The current estimate assumes no lane closures such as Wia and mudslides.

The ETE study includes a ceioridezisive analysis ofroad closures due to earthquakes.

De road closures in the analysis were very severe and provide a very good understandmg of the sensitivity of the ETE to road closures. nese estimatas can be used by emergency planners to aid in decision making for wide range of adverse conditions iadading land and road closures due to mudslides and Wing.

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In addition, durmg the January 16,1993, landalide which closed the Paci6c Coast Highway (PCH) at the San Clemente/ Dana Point border, and even more landslides during February 1993, an altamate route was established around the slide area.

! Although the PCH was not open to the general public during the clean-up period, two lanes were open for construction traffic and available for use during an emergency evacuation from January 1993 through April 1995, when the PCH was re opened.

. Issue 3. TrafBc can-tian in the vicinity of the Via de la Valle Interchange will impede evacuation.

The Via de la Valle Interchange is about 30 miles to the south of San Onofre, nis is well beyond the influence area of the EPZ evacuation traffic. Fmthennore, areas to the

, south of San Onofre generally have lighter evacuation traffic, since the population in

( the EPZ is more concentrated to tbc north. Here is no reason to be concerned with i traffic in the Via de la Valle Interchange area as it is well beyond the EPZ and outside the perimeter traffic controlarea.

Both FEMA Headquarters and FEMA Region IX staffhave reviewed the documentation supporting your request and concur with the intent of the draft

" Director's Decision on the San Onofre 2.206 Petition".

I hope the above Laranaation will be responsive to your request for assistance in ieg =Aia: to Ms. Borchmann's allegations. Do not hesitate to call D. Pringle, at 202- .

646-4123, should you have questions or require additional information.

Sincerely,

.. f M ;bMd q ~

Ihor W. Husar Chief State andLocalRegulatory Evaluation de Assessment Branch J 4