Memorandum from N. Underwood, A. Waltner, and G. Webb to Clifford K. Beck

Memorandum from N. Underwood, A. Waltner, and G. Webb to Clifford K. Beck
Typescript
3 pp.
May 22, 1952
MurNBinstrumentation052252

Reac Memo

Submitted May 22, 1952

TO: Clifford K. Beck
FROM: N Underwood, A Waltner, and G Webb
CC: Reactor Committee
SUBJECT: Instrumentation requirements for Achieving Critical Mass

These intrumentation requirements are of a dual nature. First,
the instrumentation specifically needed for the technical
operation of determining the critical mass. Secondly, the
instrumentation required from the viewpoint of possible hazards
which might arise from some accidental occurrence.

The instrumentation falling in the first category is as follows-

1. U235 pulse channel

2. BF3 " "

3. BF3 " " These have sluggish level trips

4. BF3 " "

5. B10 integrating channel

6. B10 " " These have fast level trips and
are the primary safeties

7. [gamma] " "

8. Liquid level indicator

9. Rod and shim position indicators

10. Sampling and liquid transfer device

11. Monitoring systems for the critical procedures

a. [alpha] monitor

b. air monitor

c. personnel monitors - film n sensitive

film [beta], [gamma] sensitive

dosimeter n sensitive

dosimeter [beta], [gamma] sensitive

In the second classification we have the following-

1. Campus monitors installed in permanent locations
2. Stack monitor
3. Dust monitor
4. Mobile monitor
5. Alarm system
6. Gas masks (closed cycle)
7. Liquid monitor
8. Indium foils
9. Recombiner and gas disposal system

[page 2]

Below are listed partial cost estimates-

1. U235 pulse chamber cost information unavailable

Atomic Inst 205B 120.

" " 204B 395.

" " 1010 scaler 430.

" " 410 rate meter 325.

Keleket timer 60.

Cable and connectors (50)

Level trip modification (100)

2. BF3 G.E, or R C L 130 or 105.

Nuclear Inst 128 scaler 525.

Atomic Inst 410 rate meter 325.

Cable and connectors (50)

Level trip modification (100)

3. Duplicate of 2

4. Duplicate of 2 except omit ratemeter

5. B10 ionization chamber (400)

Shop estimate from Mr. Morris (100)

Quartz insulation from G E (100)

Special alloy materials Dow (100)

Special B10 coating.. requires special techinque involving
induction heating with inter gas flow. It may be advisable
to make arrangements with Gundlach to have him coat our
chambers. This cost cannot be estimated.

Pre amp (250)

Level trip (100)

Difference amp (50)

Cabling (200)

Pure lead shield (50)

6. Duplicate of 5 except add 3 motors 105.

7. Scintillation [gamma] channel. This has not been studied with
sufficient care to make a sound estimate but it it believed
that it will be of the order of (1000)

8. Liquid level indicator (see Lancaster)

9. Rod and shim position indicators approximately
total (50)

10. Sampling and liquid transfer (see Beck)

11. Monitoring for critical procedures

2 [alpha] Zeuto 750

air monitor (100)

personnel monitor per person

2 film badge 10.

2 dosimeters [beta], [gamma] 25.

" neutron 50.

use reading devices already have

[page 3]

1. Campus monitors installed in permanent (1200)

2. Stack monitor (1000)

3. Dust monitor (200)

4. mobile monitor no estimate

5. Alarm system no estimate

(6. Console no estimate )

7. Liquid monitor (2500)

8. Log channel submitted to Nuclear Inst ?

9. Indium foils no estimate

10. Recombiner and disposal system (Menius and Murray)

11. Gas masks (300)

General

Interlocks, light panel, and hook up (1500)

1. U235 pulse channel
2. BF3 " "
3. BF3 " "		These have sluggish level trips
4. BF3 " "
5. B10 integrating channel
6. B10 " "		These have fast level trips and are the primary safeties
7. [gamma] " "		These have fast level trips and are the primary safeties
8. Liquid level indicator
9. Rod and shim position indicators
10. Sampling and liquid transfer device
11. Monitoring systems for the critical procedures
	a. [alpha] monitor
	b. air monitor
	c. personnel monitors -	film n sensitive
		film [beta], [gamma] sensitive
		dosimeter n sensitive
		dosimeter [beta], [gamma] sensitive

1.	U235 pulse chamber	cost information unavailable
	Atomic Inst 205B		120.
	" " 204B		395.
	" " 1010 scaler		430.
	" " 410 rate meter		325.
	Keleket timer		60.
	Cable and connectors		(50)
	Level trip modification		(100)
2.	BF3 G.E, or R C L		130 or 105.
	Nuclear Inst 128 scaler		525.
	Atomic Inst 410 rate meter		325.
	Cable and connectors		(50)
	Level trip modification		(100)
3.	Duplicate of 2
4.	Duplicate of 2 except omit ratemeter
5.	B10 ionization chamber		(400)
	Shop estimate from Mr. Morris		(100)
	Quartz insulation from G E		(100)
	Special alloy materials Dow		(100)
	Special B10 coating.. requires special techinque involving induction heating with inter gas flow. It may be advisable to make arrangements with Gundlach to have him coat our chambers. This cost cannot be estimated.
	Pre amp		(250)
	Level trip		(100)
	Difference amp		(50)
	Cabling		(200)
	Pure lead shield		(50)
6.	Duplicate of 5 except add 3 motors		105.
7. Scintillation [gamma] channel. This has not been studied with sufficient care to make a sound estimate but it it believed that it will be of the order of			(1000)
8.	Liquid level indicator (see Lancaster)
9.	Rod and shim position indicators approximately total		(50)
10.	Sampling and liquid transfer (see Beck)
11.	Monitoring for critical procedures
	2 [alpha] Zeuto		750
	air monitor		(100)
	personnel monitor per person
	2 film badge		10.
	2 dosimeters [beta], [gamma]		25.
	" neutron		50.
	use reading devices already have

1. Campus monitors installed in permanent		(1200)
2. Stack monitor		(1000)
3. Dust monitor		(200)
4. mobile monitor		no estimate
5. Alarm system		no estimate
(6. Console		no estimate )
7. Liquid monitor		(2500)
8. Log channel	submitted to Nuclear Inst	?
9. Indium foils		no estimate
10. Recombiner and disposal system (Menius and Murray)
11. Gas masks		(300)
General
Interlocks, light panel, and hook up		(1500)