Information Notice 1996-66, Recent Misadministrations Caused by Incorrect Calibrations of Strontium-90 Eye Applicators

Recent Misadministrations Caused by Incorrect Calibrations of Strontium-90 Eye Applicators

ML031050494
Person / Time
Site:	Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant
Issue date:	12/13/1996
From:	Cool D A NRC/NMSS/IMNS
To:
References
IN-96-066, NUDOCS 9612090360
Download: ML031050494 (15)

UNITED STATES NUCLEAR REGULATORY

COMMISSION

OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS

WASHINGTON, D.C. 20555 December 13, 1996 NRC INFORMATION

NOTICE 96-66: RECENT MISADMINISTRATIONS

CAUSED BY INCORRECT

CALIBRATIONS

OF STRONTIUM-90

Addressees

All U.S. Nuclear Regulatory

Commission

Medical Use Licensees

authorized

to use strontium-90 (Sr-90) eye applicators.

Purpose

The U.S. Nuclear Regulatory

Commission (NRC) is issuing this information

notice to alert addressees

to recent misadministrations

caused by incorrect source strength determinations

of Sr-90 eye applicators.

It is expected that recipients

will review the information

for applicability

to their facilities

and consider actions, as appropriate, to avoid similar problems.

However, suggestions

contained

in this information

notice are not NRC requirements;

therefore, no specific action nor written response is required.DescriDtion

of Circumstances

The primary causes of two recent events have been problems with calibration

and calculation

of the dose rates from Sr-90 applicators.

As a result, the administered

doses were not within 20 percent of the prescribed

dose.Case 1. In October 1995, during an inspection

of a licensee authorized

to use a Sr-90 eye applicator

in Mayag~ez, Puerto Rico, it was determined

that the calibration

record for the licensee's

Sr-90 eye applicator

was missing. A previous owner of the source lost the original calibration

certificate, and his medical physics consultant

performed

a check of the source strength.

This check was performed

with an inappropriate

measurement

instrument

and resulted in an incorrect

determination

of the source strength as 0.24 Gray (Gy)/sec 0 (24 rad/sec).

The licensee obtained the source in 1994 and relied on the erroneous

source strength determination

during treatments.

Also, the source had not been decay-corrected

by either owner since 1990. NRC urged the licensee to have the eye applicator

recalibrated

and to be instructed

in the D Fc2 proper method to calculate

the decay of the source.The licensee subsequently

had the eye applicator

recalibrated

by the National Institute

of Standards

and Technology.

The resultant

recalibration

revealed a dose rate of 0.53 Gray (53 rad)/sec rather than the 0.24 Gy (24 rad)/sec used by the licensee.

The licensee had prescribed

a total dose of between 10 to 25 Gy (1000 to 2500 rad) for approximately

9-0709036 f arr&0 C. Dr Ilt, 2a

IN 96-66 December 13, 1996 70 patients, but actually administered

about twice this amount. An NRC medical consultant

has reviewed the cases and has recommended

that the patients be evaluated

for any adverse effects.Case 2. In November 1995, while reviewing

treatment

records during a routine NRC inspection

of a licensee authorized

to use a Sr-90 eye applicator

in Honolulu, Hawaii, an NRC inspector

determined

that the licensee had incorrectly

calculated

the decay of the strength of a Sr-90 eye applicator

and subsequently

delivered

doses 20 percent over the prescribed

doses to 16 patients.

The root cause of this event was the licensee improperly

calculating

the decay of the Sr-90 source. Specifically, the licensee linearly decayed the strength of the source instead of logarithmically

decaying the source strength of the eye applicator.

Before May 1995, a technologist

had correctly

calculated

the decay of the source; however, when this technologist

left, the physician

incorrectly

calculated

the source decay based on a linear decay from the previous calculations.

In addition, the incorrect

half-life

of Sr-90 was used in the calculation.

Following

a correct determination

of the source strength, the licensee determined

that 17 misadministrations

involving

16 patients occurred, from May 6, 1995 to November 16, 1995, including

one patient who was treated on both eyes. The delivered

doses range from 21.1 to 22.7 percent greater than the prescribed

dose of 40 Gy (4000 rad).Discussion

10 CFR 35.32, *Quality Management

Program," requires licensees

to develop written procedures

to meet five objectives

associated

with any brachytherapy

dose, including

assurance

that the prescribed

dose is the administered

dose.A necessary

part of this is to ensure that the dose rate emitted from an applicator

is correct. If the manufacturer's

certificate

of calibration

or original activity/dose

rate name plate is missing, the licensee should arrange with a qualified

expert to determine

the dose rate from the Sr-90 source.(For additional

details, see NRC IN 94-17, NSr-90 Eye Applicators:

Submission

of Quality Management

Plan, Calibration

and Use," dated March 11, 1994.)Failure to implement

the Quality Management

Rule and make required reports may subject a licensee to orders, civil penalties, and notices of violation.

In view of the nature of the cited events, it appears worthwhile

to review some of the properties

of Sr-90 eye applicators

and the related processes

for decay correction

over time. New Sr-90 eye applicators

typically

contain a 2 gigabecquerel (GBq) [54 millicurie(mCi)]

source, exhibiting

a surface dose rate of about 0.50 Gy (50 rad)/sec.

The half-life

of the parent Sr-90 is 28.5 yrs [maximum beta energy equal to 0.54 mega-electron

volts (MeY)], and the yttrium-90 (Y-90) daughter half-life

is 64.2 hrs (beta-max, 2.27 MeV);therefore, both isotopes are in equilibrium

on the eye applicator.

Since Sr-90 and Y-90 are in equilibrium, emissions

from both isotopes must be accounted

for in dosimetry

calculations.

IN 96-66 December 13, 1996 The dose rate (D,) at a time (t) can be calculated

from the initial dose rate (De) at the time of the most recent calibration

with the following

formula: D = D -(e-^t) (FI)where e, the base of the natural logarithm

(2.718), is raised to the power -Xt and is referred to as the 'decay factor' (df), where -X --0.693/Tx, T. is the half-life

of the isotope, and t is the elapsed time. For Sr-90, TX-28.5 years; therefore, X -(0.693)/(28.5 yrs) = 0.0243 yr'. The values for df can be used to determine

the fraction of original activity remaining

after t years. These values can then be used to calculate

dose rates by using the following

formula: D,= Dao df (F2)The fraction of activity remaining

after a given number of years from the original measurement

date is given in Table 1 (Attachment

1).For example An eye applicator

calibrated

by the manufacturer

on January 1, 1978, delivered an initial dose rate ( Do) of 0.75 Gy/sec (75 rad/sec) on contact. If, on January 1, 1996, the eye applicator

needs to be used, the elapsed time (in years) since calibration

is 18, and from Table 1, df = 0.646 for Sr-90.Using formula F2: D, = bo. df D18yaM -(0.75 Gy/sec)(0.646)

bigyea -0.485 Gy/sec (48.5 rad/sec)

IN 96-66 December 13, 1996 Table I may be extended using formula F1 and the value X -0.0243 yr' for Sr-90. Other values of df that need to be evaluated

by licensees

will need to be re-calculated

by using the appropriate

half-life

for that isotope.Alternatively, a semi-logarithmic

plot of the above data will yield a straight line, which may be extended beyond 25 years.This information

notice requires no specific action nor written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

regional office.Donald A. Cool, D rector Division of Industrial

and Medical Nuclear Safety Office of Nuclear Material Safety and Safeguards

Technical

contacts:

Jose M. Diaz-Velez, RII (404) 331-7438 E-mail: jxd2@nrc.gov

Emilio M. Garcia, RIV (510) 975-0239 E-mail: emg@nrc.gov

James A. Smith, NMSS (301) 415-7904 E-mail: jas4@nrc.gov

Attachments:

1. List of Recently Issued NMSS Information

Notices 2. List of Recently Issued NRC Information

Notices 42 T7SS I (/4e

Attachment

I IN 96-66 December 13, 1996 Page 1 of I TABLE 1 FRACTION (EXPRESSED

AS DECIMAL) OF ORIGINAL SR-90 ACTIVITY REMAINING

AFTER (t) YEARS Years (t) df Years (t) df Years (t) df Years (t) df.25 0.994 6.5 0.854 12.75 0.734 19 0.63.5 0.988 6.75 0.849 13 0.729 19.25 0.626.75 0.982 7 0.844 13.25 0.725 19.5 0.623 1 0.976 7.25 0.838 13.5 0.72 19.75 0.619 1.25 0.97 7.5 0.833 13.75 0.716 20 0.615 1.5 0.964 7.75 0.828 14 0.712 20.25 0.611 1.75 0.958 8 0.823 14.25 0.707 20.5 0.608 2 0.953 8.25 0.818 14.5 0.703 20.75 0.604 2.25 0.947 8.5 0.813 14.75 0.699 21 0.6 2.5 0.941 8.75 0.808 15 0.695 21.25 0.597 2.75 0.935 9 0.804 15.25 0.69 21.5 0.593 3 0.93 9.25 0.799 15.5 0.686 21.75 0.589 3.25 0.924 9.5 0.794 15.75 0.682 22 0.586 3.5 0.918 9.75 0.789 16 0.678 22.25 0.582 3.75 0.913 10 0.784 16.25 0.674 22.5 0.579 4 0.907 10.25 0.78 16.5 0.67 22.75 0.575 4.25 0.902 10.5 0.775 16.75 0.666 23 0.572 4.5 0.896 10.75 0.77 17 0.662 23.25 0.568 4.75 0.891 11 0.765 17.25 0.658 23.5 0.565 5 0.886 11.25 0.761 17.5 0.654 23.75 0.562 5.25 0.88 11.5 0.756 17.75 0.65 24 0.558 5.5 0.875 11.75 0.752 18 0.646 24.25 0.555 5.75 0.87 12 0.747 18.25 0.642 24.5 0.551 6 0.864 12.25 0.743 18.5 0.638 24.75 0.548 6.25 0.859 12.5 0.738 18.75 0.634 25 0.545 Attachment

2 IN 96-66 December 13, 1996 Page 1 of I UST OF RECENTLY ISSUED NMSS INFORMATION

NOTICES Information

Date of Notice No. Subject Issuance Issued to 96-63 96-57 96-54 96-53 96-52 96-51 Potential

Safety Issue Regarding

the Shipment of Fissile Material Incident-Reporting

Require-ments Involving

Intakes, During a 24-Hour Period that May Cause a Total Effective

Dose Equivalent

in Excess of 0.05 Sv (5 rem)Vulnerability

of Stainless Steel to Corrosion

When Sensitized

Retrofit to Amersham 660 Posilock Radiography

Camera to Correct Incon-sistency in 10 CFR Part 34 Compatibility

Cracked Insertion

Rods on Troxler Model 3400 Series Portable Moisture Density Gauges Residual Contamination

Remaining

in Krypton-85 Handling System After Venting 12/05196 10/30196 10/17/96 10115/96 09/26/96 09/11196 All U.S. Nuclear Regulatory

Commission

licensees authorized

to possess special nuclear material in unsealed quantities

greater than a critical mass All U.S. Nuclear Regulatory

Commission

licensees All material licensees All industrial

radiography

licensees All U.S. Nuclear Regulatory

Commission

portable gauge licensees

and vendors All material licensees

' >Attachment

3 IN 96-66 December 13, 1996 Page 1 of I UST OF RECENTLY ISSUED NRC INFORMATION

NOTICES Information

Date of Notice No. Subject Issuance Issued to 96-65 96-64 96-63 96-62 96-61 96-60 Undetected

Accumulation

of Gas in Reactor Coolant System and Inaccurate

Reactor Water Level Indication

During Shutdown Modifications

to Con-tainment Blowout Panels Without Appropriate

Design Controls Potential

Safety Issue Regarding

the Shipment of Fissile Material Potential

Failure of the Instantaneous

Trip Function of General Electric RMS-9 Programmers

Failure of a Main Steam Safety Valve to Reseat Caused by an Improperly

Installed

Release Nut Potential

Common-Mode

Post-Accident Failure of Residual Heat Removal Heat Exchangers

1211 1/96 12/10196 12/05196 11120196 11/20/96 11/14/96 All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for nuclear reactors All U.S. Nuclear Regulatory

Commission

licensees

authorized

to possess special nuclear material in unsealed quantities

greater than a critical mass All holders of OLs and CPs for nuclear power plants All holders of OLs or CPs for nuclear power.reactors All holders of OLs or CPs for nuclear power reactors OL = Operating

License CP = Construction

Permit

IN 96-66.December 13, 1996 Table 1 may be extended using formula FH and the value x -0.0243 yr 1 for Sr-90. Other values of df that need to be evaluated

by licensees

will need to be re-calculated

by using the appropriate

half-life

for that isotope.Alternatively, a semi-logarithmic

plot of the above data will yield a straight line, which may be extended beyond 25 years.This information

notice requires no specific action nor written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

regional office.Donald A. Cool, Director Division of Industrial

and Medical Nuclear Safety Office of Nuclear Material Safety and Safeguards

Technical

contacts: Jose M. Diaz-Velez, RII (404) 331-7438 E-mail: jxd2@nrc.gov

Emilio M. Garcia, RIV (510) 975-0239 E-mail: emg@nrc.gov

James A. Smith, NMSS (301) 415-7904 E-mail: jas4enrc.gov

Attachments:

1. List of Recently 2. List of Recently Issued NMSS Information

Notices Issued NRC Information

Notices Official Record Copy S:\Jsmith\imns5350.JAS

OFC IMAB I E IMAB lIMAB I IMOB I Tech Ed I KANE JASmith SLMerchant

LWCamper o JMPiccone

o EKraus o DATE 1 11/26/96 11/26/96 1 10/28/96 10/29/96 8/01/96 OFC J JE I OGC I DD/IMNS I D/IMNS I NAME JLiebermano

SATreby o FCCombso DACool DATE 08/07/96 1 1/07/96 11/12/96 I 11/29/96-COWVER E = COVER & Attachment

N -NO COPY o- See Previous Concurrence

eIN 96-##'J November .1996 Table 1 may be extended using formula F1 and the value A = 0.0243 yr" for Sr-90. Other values of df that need to be evaluated

by licensees

will need to be re-calculated

by using the appropriate

half-life

for that isotope.Alternatively, a semi-logarithmic

plot of the above data will yield a straight line, which may extended beyond 25 years.This information

notice requires no specific action nor written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

regional office.Donald A. Cool, Director Division of Industrial

and Medical Nuclear Safety Office of Nuclear Material Safety and Safeguards

Contacts: Jose M. Diaz-Velez, RII (404) 331-7438 Internet:

JXD2@NRC.GOV

Emilio M. Garcia, RIV (510) 975-0239 Internet:

EMG@NRC.GOV

James A. Smith, NMSS (301) 415-7904 Internet:JAS4@NRC.GOV

Attachments:

1. Table of decay factors 2. List of Recently Issue(3. List of Recently Issue(fffirial Rernrd COnY Svisr d NMSS Information

Notices d NRC Information

Notices nith\imns5350JAS

OFC IMAB lE IMAB lIMAB lIMOB j Tech Ed NAME JASmi SLM@f@I~nt

LWCamper o JMPiccone

o EKraus @DATE it /96 i 10/8/ 9 6 10/29/96 8/01/96 OFC OE I OGC DD/IMNS DlIMNS NAME JLieberman@

SATreby @ FCCombs@ _____ __ _ _l DATE 08/07/96 11/07/96 11/12/96 ///t11/96= COVER E = COVER & Attachment

N = NO COPY ?--See Previous Concurrence

N 96-Il-N ovember 91996 This information

notice requires no specific action nor written respons .If you have any questions

about the information

in this notice, please c tact one of the technical

contacts listed below or the appropriate

reglo 1 office.Donald A. Cool, Director, Division of Industrial

and Medical Nuclear Sa ty Office of Nuclear terial Safety and Safeguards

Contacts:

Jose M. Diaz-Velez, RI (404) 331-7438 Internet:

JXD2@NRC.GOV

Emilio M. Garcia, RIV (510) 975-0239 Internet:

EMG@NRC.GOV

James A. Smith, NMSS (301) 415-7904 Internet:JAS4@NRC.GOV

Attachments:

1. Table of decay factors 2. List of Recently Issued NMS Information

Notices 3. List of Recently Issued MR Information

Notices Official Record Copy 5: \smitinins5350.JAS

OFC IMAB I E IMAB//1S IMAB I IMOB I Tech E NAME JASmithm SL e rc nt LWCamper o JMPiccone

a EKraus o DATE t/ /14/96 A/ 96 10/28/96 10/29/96 8/01/96 OFC OE l OGC DD/IMNS D/IMNS NAME JLiebermanq/

SATreby o FCCombso DACool DATE 08/07/9 11/07/96 11/12/96 / /96 C = COVER E M OVER h Attachment

N a NO COPY o- See Previous Concurrence

. N 96-##a *-i ovember .1996 D 18year " (0.75 Gy/sec)(0.646)

blyrs, 0G 0.485 Gy/sec Table 1 may be extended using formula F1 and the value A 0.0243 yr-.Alternatively, a semi-logarithmic

plot of the above dat will yield a straight line, which may extended beyond 20 years.This information

notice requires no specific actio nor written response.

If you have any questions

about the information

in t s notice, please contact one of the technical

contacts listed below or t appropriate

regional office.Donald .Cool. Director Divis on of Industrial

and M ical Nuclear Safety Ofice of Nuclear Material Safety and Safeguards

Contacts:

Jose M. Diaz-Velez, (404) 331-7438 Internet:JMD2@NRC.

V Emilio M. Garci , RIV (510) 975-0239/Internet:EM

C.GOV James A. S ,th NMSS (301) 415- 904 Internet- AS4@NRC.GOV

Attachments:

1. List of Recent y Issued NMSS Information

Notices 2. List of Rece ly Issued NRC Information

Notices Official Recordo S:\jsmith\imns5350.JAS

OFC IMA E IMAB jI I I MOB I Tech Ed i NAME I ant LWCamper o JMPiccone

@ EKraus o DATE / /1196 le /6///96 10/28/96 10/29/96 8/01/96 OFC / OE I OGC DD/IMNS D/IMNS lAM JLiebermano

SATreby o FCCombso DACool D0/07/96 11/07/96 11/12/96 / /96 ,COVER E = COVER & Attachment

N = NO COPY @- See Previous Concurrence

N 96-ft<iovember

,1996 D (0.75 Gy/sec)(0.646)

.0.485 Gy/sec Table 1 may be etended using formula F1 and the value X -0.0243 yr 1.Alternatively, a mi-logarithmic

plot of the above data will yield a straight line, which may ext nded beyond 20 years.This information

noti requires no specific action nor written response.

If you have any questions

bout the information

in this notice, please contact (one of) the technical

c tact(s) listed below or the appropriate

regional office.Donald A. Cool, Director Division of Industrial

and Medical Nuclear Safety Office of Nuclear Material Safety and Safeguards

Contacts:

Jose M. Diaz-Velez, RII (404) 331-7438 Internet:JMD2@NRC.GOY

Emilio M. Garcia, RIV (510) 975-0239 Internet:EMG@NRC.GOV

James A. Smith, NMSS (301) 415-7904 Internet:JAS4@NRC.GOV

Attachments:

1. List of Recently Issued NMSS Information

Notices 2. List of Recently Issued NRC Information

Notices Official Record Copy S:\Jsmith\imns5350.JAS

\OFC qIMABiLW B IM4AB -IMOB l E\Tech Ed NAME JASm1 i SL chant LWCamper a JMPiccone

c EKraus o DATE I I 1/96 _ / j 10/28/96 10/29/96 8/01/96 OFC OE OGC DD/IMNS D/IMNS NAME JLiebermano

SATreby a F (Cm DACool DATE 08/07/96 11/07/96 / /96 C a COVER E a CUVLK & Attacnment

N = mU LUr1'u- aee rrevmuUs IA0ICUIIrCLM.

,N 96-##' "-'-6ctober

,1996 ble8.. -(0.75 Gy/sec)(0.646)

l 0.4 y/sec Table 1 may be extended using fo ula F1 and the value X -0.0243 yre.Alternatively, a semi-logarithmic

lot of the above data will yield a straight line, which may extended beyond 20 ars.This information

notice requires no sp ific action nor written response.

If you have any questions

about the in frma ion in this notice, please contact (one of) the technical

contact(s)

listed elow or the appropriate

regional office.Donald A. -ool, Director Division o Industrial

and Medical Ntclear Safety Office of N clear Material Safety and Safegu rds Contacts:

Jose M. Diaz-Velez, RII (404) 331-7438 Internet:JMD2@NRC.

GOY Emilio M. Garcia, RIV (510) 975-0239 Internet:EMG@NRC.GOV

James A. Smith, NMSS (301) 415-7904 Internet:JAS4@NRC .GOV Attachments:

1. List of Recently Issued NMSS Information

Notices 2. List of Recently Issued NRC Information

Notices Official Record Copy S:\Jsmithi\mns5350.JAS

\OFC IMAB AB IMAB I l IMOB l \l,Tech EdlNAME JASai R SUM nt LWCamper a JMPiccone

o EKraus o DATE / -J/ 10/28/96 10/29/96 8/01/96 OFC OE DD/IMNS D/IMNS KANE JLiebermano

S ireb NIL FCCombs DACool DATE 08/07/96 l/ /1/96 / /96 / /96 aCOVER E a COVER & Attachment

K = ND COPY o- See Previous Concurrence

\

C, 6 I< ~N 96-#t 4 October ,1996 We have Dlew. -(0.75 Gy/sec)(0.646)

Table I may be extended using formula FH and the value X -0.0243 yr 1.Alternatively, a semi-icgarithmic

plot of the above data will yield a straight line, which may extended be~yond 20 years.This information

notice requires no specific action nor written response.

If you have any questions

about the information

in this notice, please contact (one of) the technical

contact(s)

listed below or the appropriate

regional office.Donald A. Cool, Director Division of Industrial

and Medical Nuclear Safety Office cf Nuclear Material and Safrguards

Safety Contacts: Jose M. Diaz-Velez, RII (404) 331-7438 Internet:JMD2@NRC.60V

Emilio M. Garcia, RIV (510) 975-0239 Internet:EMG@NRC.GOY

James A. Smith, NMSS (301) 415-7904 Internet:JAS4@NRC.GOV

Attachments:

1. List 2. List Official of Recently of Recently Record CODY Issued NMSS Information

Notices Issued NRC Information

Notices SA:smithkimtns535GJAS

OFC IMAB E IMAB Tech NAME JASmi S on rchant C rer EKraus o DATE It /1 /96 /96 96 /09 /96 8/01/96 OFC OE lOGC lDD/IMNS l D/IMNS l~KANE JLiebermano

SATreby FCCombs DACool DATE 08/07/96 / /96 I /96 / /96:* COVER E a COVER & Attachment

N = NO COPY e- See Previous Concurrence

A 'IN 96-##August ,1996 This informat n not1ce requires no specific action nor written response.

If you have any qu tions about the information

in this notice, please contact (one of) the techn cal contact(s)

listed below or the appropriate

regional office.Donald A. Cool, Director Division of Industrial

and Medical Nuclear Safety Office of Nuclear Material Safety and Safeguards

Contacts:

Jose M. Diaz-Velez, RII (404) 331-7438 Emilio M. Garcia, RIV (510) 975-0239 James A. Smith, NMSS (301) 415-7904 Attachments:

1. List of Recently Issued NMSS Information

Notices 2. List of Recently Issued NRC Information

Notices Official Record Copy G:\imns5350.JAS , )OFC IMAB l E I OGC lTech Ed NAME JASmi'W per SATreby EKraus a DATE *in /96 __ /________

\___96 / /96 8/01/96 OFC \ lI I DD/IMNS l D/IMNS lNAME Q jeerman FCCombs DACool DATE ___9_ / /96: w COVER 'E i. COVER & Attachment

N = NO COPY o- See Previous Concurrence