Technical Area 55 Entry Control System (ECS). [Plutonium facilities] Page: 3 of 9


Art Beaumont, MST-l
Ed Brundige, MST-1l
Robert DesJardin, E-8
P-ynaldo Rivers, E-8
Los amos National Laboratory
Gos Alamos, Nl 87545
Abstract. The exchange badge system which was used at the Pluto-
nium Facility located in Technical Area 55 was replaced on a
trial basis with an automated Entry Control System.
As a result of the success of the trial Lystem, a new eye-
tem incorporating expanded features and increased reliability is
being implemented. The new Entry Control System incorporates
several features not previously available in relatively Inex-
pens'.ve entry systems.
The reliability of the system is enhanced by redundant
microprocessors incorporating bubble memory for nonvolatile
sorage of the system data base. The badge readers incorporate
dual communication lines to two different controller to further
increase the total system reliability.
System i.istallation is anticipated i.. April of 1984.

The Los Alamos National Laboratory Plutoniur
Facility is Located at Technical Area 55 (TA-5)
in Los .Alamos, New Muxico. When the TA-M5,
Facilit) was built In the mid lie 170n, an ex
change badge syNtem was used to control access
into the plutonium building. The exchange badge
syNLm proved Lo be cumbersome, time-consUming,
and difficult in handling the normal working
t raffic, and in particular, the large number of
in thl h nts 1970s, a new sn~e.urily badge it-a
corpornLing it high energy magnet Lc stripe was put
into service by the Laborntory Security Uivisain.
The high energy stripe was chosen beenuNe of It
flexibility, enNt' of encoding, durability, and i'
may he procured and iiiaiina al at A ri'sonabl cost
by the ahurtry Baa~' itl listi.
An nuttuuated Entry Control ( :Cs) In-
ioupor l iig 1 his nsw iadg Wis I plmelLd and
installed in parallel witi the existing rxhanahA
hadge system. The autsmnatd system quiiky pr'v'd
its uppiority tin providing more ditatled rt-
cords, n muste cahplilily lii the event sit
umsrg' ielss and much ho'tter rea l-Im a'i'l ctr I
ovir flti operational data hasv. Als Ltr'e yiars
It NuesPil'a'i I operation, s new EC's has bell dl-
Ignedii 1wih Imprisviad rr1ist lii y and ep.)andd
esiasisi litir. 'lists new system ;N the qsibject ot
this paper.


The primary purpose of the ECS is to monitor
and contr&'. all puesonnel movement at TA-55. The
ECS is not a ';eplacement for, but an aid to the
security force. Security is atil provided by the
guards through badge verficat lol'.
Authoriring visit ors into the 11iutoaltum
'ac iit y is the respnibilit) of the site
operating gr up. The ECS provides the operating
groan with it real-time cottrol on nil sfitor
activity. Visttor badges are signed and entered
int a r data hiae bit the uperating group during
nurnial operating hours and by control room pe. soan-
ni'l after hours. Viaiterm are required to have
ala escort before entering the Plutonium Facility.
The ECS pruvi'ieN ver' letions to the guard 1
Idil vidtiIN utilurir.vid a emetistn. At tile end of
ltr day, the UCH provides detailed rt por? s on al I
visitor activity.
Saicty ha of primary mortaince at TA-!5.
All opsratlog ,srsaoniI are required to haava perI-
oiia aliinh i ltalt Ier to ontltinue woki ng in th'
plitastilIUm Fa"llity. KCS provides chrssks oil ilI
prro l and dieit 's ase''ss to anyon' wharle
Itraiing haac aixured. To aid the operating group
it maintaining re rds, hadge readers ars living
ililt ii led at t 'l TA'' 5a lud.t I i m ent rance. ft"
esrdt of all imannie Iagged iata required
L:- Itang meetings are attaumalia IIy Updated.
MNas LI tg at t'ndaiess cana alsoie logged N at service
to any sudItorum unser.

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Beaumont, A.; Brundige, E.; DesJardin, R. & Rivera, R. Technical Area 55 Entry Control System (ECS). [Plutonium facilities], article, January 1, 1984; New Mexico. ( accessed April 23, 2019), University of North Texas Libraries, Digital Library,; crediting UNT Libraries Government Documents Department.

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