ML19344D059

Ack Telcon Re Tests on Models Century S,Sa & Century Universal S,Sa.Forwards Table 2 Re Dosage Readings Before & After Each Test

ML19344D059
Person / Time
Site:	07109135
Issue date:	01/23/1980
From:	Richardson H NUCLEAR SYSTEMS, INC.
To:	Marotta C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
15309, NUDOCS 8003110158
Download: ML19344D059 (2)

Text

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Mr. Charles Marotta Nuclear Regulatory Commission f

Washington, D. C. 2055 N

Dear Mr. Marotta:

Thank you for your telephone call relative to the tests on the Century models manufactured by Gamma Industries.

A thorough review of the test data has been made.

Since there was no damage to the exterior of the devices tested and no damage to the in-terior of the devices tested, the data presented in Table 2 accurately reflect the dosage readings both before and after each test.

A state-ment verifying this fact has been added to Table 2.

Sufficient copies have been enclosed for insertion into the copies submitted to NRC for analysis.

Please let me know if other information can be submitted which will ass-ist in the review process.

S cerely

ours,

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Appendix TABLE 2

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'Models Century S, SA, Century Universal c, SA Radiation Profile Were Measured On Two (2) Differenc Century Models

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_ Obtain " Typical" External Dosage N

NOTE:

a.

All data measured in Mr/hr.

b.

Survey Measured with 111 ci Ir-192 Within Century c.

Results Reported Extrapolated To 120 ci Ir-192.

d.

Measurements Made With Gamma Survey Model 200 Using GM Tube Model LND'714.

e.

Radiation measurement made before and after each test were identical Over Top Cover Below Dottom Cover Elevation Elevation Elevation Elevation Elevation DISTANCE Surface 6" 36" Surface 6" 36" Surface 6" 36" Surface 6" 36" Surface 6" 36" P

A 66 7

0.6 65 8

0.7

'O B

71 27 1.-6 137 29 2.7 82 27 2.2 22 10 1.6 24 11 1.8 S

C 115 28 1.6 148 27 1.6 50 7

1.6 55 6

1.6 58 8

1.6 I

D 44 10 0.6 77 17 0.6 44 9

0.6 61 12 1.6 17 11 1.7 T

E 82 30 2.2 165 41 2.7 104 33 2.2

'55 10 1.6 14 12 1.6 I

F 77 21 1.6 155 27 1.6 83 22 1.6 38 11 1.6 35 13 1.6 O

G 66 14 0.6 44 27 1.6 55 22 1.6 38 17 1.6 34 15 1.7 N

H 82 17 1.1 99 24 1.6 71 17 2.2 49 10 1.6 46 11 1.6 I

93 27 1.6 154 31 1.6 88 28 1.6 44 9

1.6 42 10 1.6 4

J 55 10 0.6 53 9

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