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Evaluate radioactivity in the rock at Henderson. Proposed first generation LBCF at Henderson DUSEL. Don’t put it underground unless it’s absolutely necessary. When you do, Go Deep. Harrison Mountain Elev. 12,300 ft. Red Mountain Elev. 12,300 ft. Red Mountain Porphyry. Silver Plume

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Evaluate radioactivity

in the rock at Henderson

Proposed first generation LBCF

at Henderson DUSEL


Don’t put it underground unless

it’s absolutely necessary

When you do, Go Deep


Harrison Mountain

Elev. 12,300 ft

Red Mountain

Elev. 12,300 ft

RedMountain

Porphyry

Silver Plume

Granite

Silver Plume

Granite

Henderson

Orebody

Urad Porphyry

7500 Level

7065 Level

Central Campus

Elev. 6800 ft, (4300 mwe)

Access Ramps

Henderson

Granite

Midway Campus

Elev. 5850 ft, (5100 mwe)

Lower Campus

Elev. 4900 ft. (5800 mwe)


DUSEL-12

DUSEL-19

-------------------------

DUSEL-01-367’

DUSEL-01-957’

DUSEL-01-1507’

DUSEL-01-2346’

DUSEL-01-2422’


Gamma Ray Analysis

of Henderson Cores


No chemistry

Direct counting

24 hours

Standardized source

8keV – 1836 keV


Objectives

Locate discrete peaks in spectrum

Identify gamma emitting iostopes

Compare with U and Th series

Any surprises ?

Determine radioactivity

Project U and Th Concentrations

Use Results as Source terms for

LBCF Shielding and Design


Results

All Identifiable Peaks Associated

with Natural Background

Estimates of Radioactivity

restricted to peaks > 100 keV

No trends identified with

Old vs New cores or depth of core


Estimates of Th and U projected from

Isotopes before Radon in each series.


Core Analysis

Peter Sprenger

Aaron Zimmerman


Harrison Mountain

Elev. 12,300 ft

Red Mountain

Elev. 12,300 ft

Shaft

Silver Plume

Granite

Silver Plume

Granite

Henderson

Orebody

Urad Porphyry

Primos

Porphyry

Upper Campus

Elev. 8100 ft, (2500 mwe)

Access Ramps

Internal Shaft

Henderson

Granite



LBCF:Upper Campus

2500 mwe

Location available early

Easy access from surface

Provide service to first round of

experiments while central and

lower campuses are under construction


LBCF:Upper Campus

Screening of components

Detector development

Low Level Counting research


LBCF:Upper Campus

Comprehensive facility

Competent staff

Emphasize QA/QC

Component quarantine

Close to chemistry laboratory

Close to electroforming facility


LBCF:Upper Campus

Clean room conditions

Radon control (ventilation)

Flexible floor plan


Pass

Incoming

Fail


Pass

g

g

g

g

g

Incoming

Fail


Pass

g

g

g

g

g

b

Incoming

Fail


LBCF:Upper Campus

Ultra low shielded vault

Radon abatement

Flexible floor plan


Pass

g

g

g

g

Incoming

Fail

b



Upper campus layout2
Upper Campus Layout

Corridor

Office





All Identifiable Peaks Associated

With Natural Background

Estimates of Radioactivity

Restricted to peaks > 100 keV

Estimates of Th and U projected from

Isotopes before Radon in each series.


Objectives

Locate discrete peaks in spectrum

Identify gamma emitting iostopes

Compare with U and Th series

Project U and Th Concentrations

Use Results as Source terms for

LBCF Shielding and Design


Gamma Ray Analysis

of Henderson Cores


Harrison Mountain

Elev. 12,300 ft

Red Mountain

Elev. 12,300 ft

Red Mountain

Porphyry

Silver Plume

Granite

Shaft

Silver Plume

Granite

Henderson

Orebody

Urad Porphyry

1st Drill Hole

Primos

Porphyry

7500 Level

2nd Drill Hole

7065 Level

Central Campus

Elev. 6800 ft, (4300 mwe)

Access Ramps

Internal Shaft

Henderson

Granite

EarthLab/

Geoscience

Area

Midway Campus

Elev. 5850 ft, (5100 mwe)

Lower Campus

Elev. 4900 ft. (5800 mwe)



Pass

Incoming

Fail

Floor Plan


Objectives

Locate discrete peaks in spectrum

Identify gamma emitting iostopes

Compare with U and Th series

Project U and Th Concentrations

Use Results as Source terms for

LBCF Shielding and Design


No chemistry

Direct counting

24 hours

FWHM 0.6% at 350 keV

Standardized source

8keV – 1836 keV


Pass

Incoming

Fail

() High purity Ge

(a) Si Surface barrier

(b) Proportional counters

Sample Storage

Room

(a,b,g) Walk - in Vault

Control console


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