ML20148J625
| ML20148J625 | |
| Person / Time | |
|---|---|
| Site: | Framatome ANP Richland |
| Issue date: | 06/09/1997 |
| From: | Edgar J SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER |
| To: | Hardin K NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| JBE:97:107, NUDOCS 9706170209 | |
| Download: ML20148J625 (13) | |
Text
- - -
SIEMENS Gros 9 June 9,1997 JBE:97:107 U.S. Nuclear Regulatory Commission Attn.: Ms. K. J. Hardin Licensing Branch Division of Fuel Cycle Safety and Safeguards, NMSS Washington, DC 20555
Dear Ms. Hardin:
Ref.: 1. Letter, K.J. Hardin to L.J. Maas, " Request for Additional Information, Amendment Application dated February 21 and March 7,1997 (TAC No. L30947)", dated May 13, 1997.
i Ref : 2. Letter, J.B. Edgar to K.J. Hardin, dated June 4,1997.
Per the reference 1 request and my recent conversations with you and Susan Chotoo, Siemens Power Corporation (SPC) agrees to abide by the recommendation of 100 LFPM for laboratory hoods containing radioactive material in " Industrial Ventilation: A Manual of Recommended Practices",19* edition. Per my agreement with Ms. Chotoo both the 100 and 125 LFPM values on pages 3-4 of SPC's license application will be stated in terms of average flow plus or minus 15 percent.
1 Enclosed to effect this change are six copies of revised pages 3-4.
Please use this submittalin place of reference 2, which contained an error.
! /
If you require additional information, please call me at 509-375-8663.
l Very truly yours, o
Any lN! !! h, James B. Edgar 1
Staff Engineer, Licensing l
/pg Siemens Power Corporation Nuclear Division 2101 Horn Rapids Road Tel:
(509) 375-8100 Engineering & Manuf acturing P.o. Box 130 Fax:
(509) 375-8402 Richland. WA 99352-0130 9706170209 970609 PDR ADOCK 07001257 l
C PDR
J Siemens Power Corporation - Nuclear Division e w.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257 l
PART I-LICENSE CONDITIONS
! nsv.
! 36 j
I shall be permitted provided a personnel survey is performed first.
Aduitional step-off areas may be established for maintenance work, temporary situations or conditions, or to accornmodate personnel entry and exit nei requiring the use of change room facilities. Personnel survey requirements shall be adhered to at all I
step-off areas.
3.2.1.4 Protective Clothina Protective clothlag shall be provided for personnel entering contamination controlled areas. The type (s) of clothing required shall be consistent with the individual's work assignment and is dependent upon the type and level of contamination anticipated.
Used protective clothing shall be removed prior to entering clean areas from contamineted areas, with the exception of emergency evacuations or if specifically authorized by a Radiation Work Procedure.
i 3.2.1.5 Personnel Surveys I
l Personnel survey instruments shal! be provided in change rooms and at step off pads -
for use by personnel leaving contaminated areas. Personnel exiting contaminated i areas shall be required to survey themselves after removing their protective clothing l prior to leaving the step-off area. An exception to survey requirements is exiting l
t l
during emergency evacuations.
I l
i l
3.2.2 Ventilation General ventilation systems shall be designed and maintained to limit the spread of g
airborne contamination by maintaining air pressure gradients and airflows from general areas of low potential airbome contamination to general areas of higher potential contamination. Where ventilation barriers exist between areas, these systems shall be l
balanced so that the air pressure differentials between cisen and contaminated areas are maintained at a minimum of 0.oS inch of water.
l Air locks shall be installed, where necessary, to insure maintenance of proper air pressure differentials. Installed differential air pressure measuring instrument readings l shall be recorded at least monthly.
Monthly smoke tests shall be conducted to visually demonstrata that the airflows are from general areas of low contamination potential to general areas of higher contamination potential.
General recirculating air systems shall recirculate air only from room areas (not from s
l.
AMENOMENT APPucATON04TE:
PAGE NQ.;
s October 28,1996 3-3 I
sPc.ND 3330.947 (R-19742) j
SiemenS Power Corporation - Nuclear Division sup.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257 I
PART I-LICENSE CONDITIONS l nev.
l i
j i
process enclosures) and pass it through fire retardant HEPA filters, which have installed efficiencies of at least 99.95% for O.8 micron particles, before returning it to the room.
in addition to general ventilation systems, SPC may employ local ventilation units designed to recirculate room air through HEPA filters, and then discharge room air at i
^
low velocities, to minimize the airborne concentrations in breathing zones.
l Recirculated air, excluding that from the local ventilation units described above, shall be continuocr monitored prior to the final stage of HEPA filtration. An indication that airbornt ;svels are such that a 40 DAC-hour (derived air concentration-hour) i exposure could be realized in a week from the recirculated air shall automatically divert the air from the recirculation mode to the respective facility exhaust air system.
Manual diversion shall be allowed during maintenance on the system.
A minimum of seven air changes an hour shall be maintained in contaminated areas.
I
' Unless safety concerns override, the average air velocity through openings in uranium I
handling hoods, with exception of laboratory hoods, and equipment containing readily dispersible uranium shall be average of 125 LFPM (linear feet / min) 15 %
The average flow through laboratory hoods shall be 100 LFPM 15 % These velocities shall be checked at least monthly.
Both general recirculation and exhaust air system HEPA filter installations shall be equipped with continuous pressure differential measuring and indicating systems i
whose readings shap be recorded at least monthly. The differential pressure across the final HEPA fitters shall not exceed four inches of water gauge. The final HEPA
! filter installations shall also be checked prior to first use for efficiency against 0.8 l micron particles and must meet or exceed a removal efficiency of 99.95 percent, i
3.2.3 Werk Area Air pamplina 1
in areas where unencapsulated radioactive materials are handled, processed, and/or air I
concentrations are likely to exceed 10 percent of DAC, air shall be routinely j
monitored. Fixed air sampling heads may be used for calculating DAC hours in areas where internci dose monitoring is required. Air samp(e concentrations determined by fixed samplers may be modified by cortection factors.
1 i
Specialized air sampling or monitoring equipment, such as continuous air monitors,
(
portable, high volume, and/or lapel air samplers, shall be available to supplement the normal air sampling system, and for use in studies or work on special problems.
l l AMENOMENT APPtICATON DATE:
PAGE NOc l
June 9,1997 3-4 sPC ND 3330 W (R iio792)
Siem:ns Power Corporation - Nucitar Division eur.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKE'i NO. 70-1257 l
i i
PART I-LICENSE CONDITIONS
' asy.
i 36 j
shall be permitted provided a personnel survey is performed first.
l i
i Additional step-off areas may be established for maintenance work, temporary situations or conditions, or to accommodate personnel entry and exit not requiring the i
l
{
use of change room facilities. Personnel survey requirements shall be adhered to at all l j
step-off areas.
i i
l 3.2.1.4 Protective Clothina l
Protective clothing shall be provided for personnel entering contamination controlled i
areas. The type (s) of clothing required shall be consistent with the individual's work !
}
assignment and is dependent upon the type and level of contamination anticipated.
i i
l Used protective clothing shall be removed prior to entering clean areas from l
l contaminated areas, with the exception of emergency evacuations or if specifically i
g I authorized by a Radiation Work Procedure.
l i
i d
3.2.1.5 Personnel Surveys i
Personnel survey instruments shall be provided in change rooms and at step off pads i for use by personnel leaving contaminated areas. Personnel exiting contaminated l
I areas shall be required to survey themselves after removing their protective clothing I
i prior to leaving the step-off area. An exception to survey requirements is exiting l
l during emargency evacuations.
l l
1 i
i 3.2.2 Ventilation l
i General ventilatiori systems shall be designed and maintained to limit the spread of l airborne contamination by maintaining air pressure gradients and airflows from general areas of low potential airborne contamination to general areas of higher potential contamination. Where ventilation barriers exist between areas, these systems shall be balanced so that the air pressure differentials between clean and contaminated areas are maintained at a minimum of 0.05 inch of water.
Air locks shall be installed, where necessary, to insure maintenance of proper air pressure differentials. Installed differential air pressure measuring instrument readings shall be recorded at least.ei ij4 T
Monthly smoke tests shall be conducted to visually comonstrate that the airflows are from general areas of low contamination potential to general areas of higher contamination potential.
I General recirculating air systems shall recirculate air only fiom room areas (not from s
AMENOMENT APPUCATON OME:
P80E W a
October 28.1996 3-3 sPC No2330.947 (R uC7/92)
~
=
Siemens Power Corporation - Nuclear Division egg.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257 PART I-LICENSE CONDITIONS nev.
process enclosures) and pass it through fire retardant HEPA filters, which have installed efficiencies of at least 99.95% for 0.8 micron particles, before returning it to the room.
in addition to general ventilation systems, SPC may employ local ventilation uni st designed to recirculate room air through HEPA filters, and then discharge room air at low velocities, to minimize the airborne concentrations in breathing zones.
Recirculated air, excluding that from the local ventilation units described above, shall be continuously monitored prior to the final stage of HEPA filtration. An indication that airborne levels are such that a 40 DAC-hour (derived air concentration-hour) exposure could be realized in a week from the recirculated air shall automatically divert the air from the recirculation mode to the respective facility exhaust air system.
Manual diversica shall be allowed during maintenance on the system.
I A minimum of seven air changes an hour shall be maintained in contaminated areas.
Unless safety concerns override, the average air velocity through openings in uranium handling hoods, with exception of laboratory hoods, and equipment containing readily
!' dispersible uranium shall be average of 125 LFPM (linear. vet / min) i15%
The average flow through laboratory hoods shall be 100 LFPM i15E These velocities chall be checked at least monthly.
. Both general recirculation and exhaust air system HEPA filter installations shall be l equipped with continuous pressure differential measuring and indicating systems i
whose readings shall be recorded at least monthly. The differential pressure across the final HEPA filters shall not exceed four inches of water gauge. The final HEPA '
filter installations shall also be checked prior to first use for efficiency against 0.8 micron particles and must meet or exceed a removal efficiency of 99.95 percent.
i 3.2.3 Work Area Air Samolina In areas where unencapsulated radioactive materials are handled, processed, and/or air l concentrations are likely to exceed 10 percent of DAC, air shall be routinely l monitored. Fixed air sampling heads may be used for calculating DAC-hours in areas where internal dose monitoring is required. Air sample concentrations determined by fixed samplers may be modified by correction factors.
, Specialized air sampling or monitoring equipment, such as continuous air monitors, i portable, high volume, and/or lapel air samplers, shall be available to supplement the normal air sampling systern, and for use in studies or work on special problems.
l I
. AMENDMENT APPLCATON DATE:
PAGE NO.:
l June 9,1997 3-4 SPc-ND:3330 947 (41i07$2)
Slemens Power Corporation - Nuclear Division EMF.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257 i
i i
PART I-LICENSE CONDITIONS nev. l 36 i
shall be permitted provided a personnel survey is performed first.
i Additional step-off areas may be established for maintenance work, temporary situations or conditions, or to accommodate personnel entry and exit not requiring the i l
use of change room facilities. Personnel survey requirements shall be adhered to at all l I
step-off areas.
i l
3.2.1.4 Protective Clothine Protective clothing shall be provided for personnel entering contamination controlled I
areas. The type (s) of clothing required shall be consistent with the individual's work assignment and is dependent upon the type and level of contaminatbn anticipated.
l Used protective clothing shall be removed prior to entering clean areas from j
contaminated areas, with the exception of emergency evacuations or if specifically j
l' authorized by a Radiation Work Procedure.
i 3.2.1.5 Personnel Survay,g l
l t
Personnel survey instruments shall be provided in change rooms and at step off pads l
l i for.use by personnel leaving contaminated areas. Personnel exiting contaminated j areas shall'be required to survey themselves after removing their protective clothing l prior to leaving the step-off area. An exception to survey requirements is exiting I
during emergency evacuations.
l l
i i
3.2.2 VentRation i
I General ventilation systems shall be designed and maintained to limit the spread of l
o airbome contamination by maintaining air pressure gradients and airflows from general 1
areas of low potential airbome contamination to general areas of higher potential contamination. Where ventilation barriors exist between areas, these systems shall be balanced so that the air pressure differentials between clean and contaminated areas are maintained at a minimum of 0.05 inch of water.
Air locks shall be installed, where necessary, to insure meintenance of proper air pressure differentials. Installed differential air pressure measuring instrument readings shall be recorded at least monthly.
Monthly smoke tests shall be conducted to visually demonstrate that the airflows are l
l from general areas of low contamination potential to general areas of higher contamination potential.
General recirculating air systems shall recirculate air only from room areas (not from e AMENOMENT APPLCA!10N OATE:
PAGENOJ October 28,1996 33 sPC NO2330.947 (R.1707/92)
-,--o
r l
Siemens Power Corporation - Nuclear Division eup.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257 i
t l
PARTI-LICENSE CONDITIONS nev.
i t
l process enclosures)- and pass it through fire retardant HEPA ~ filters,.which have i
installed efficiencies of at least 99.95% for 0.8 micron particles, before returning it to the room.
i In addition to general ventilation systems, SPC may employ local ventilation units i
designed to recirculate room air through HEPA filters, and then discharge room air at l
low velocities, to minimize the airborne concentrations in breathing zones.
L Recirculated air, excluding that from the local ventilation units described above, shall be continuously monitored prior to the final stage of HEPA filtration. An indication that airborne levels are such that a 40 DAC-hour (derived air concentration-hour) exposure could be realized in a week from the recirculated air shall automatically
. divert the air from the recirculation mode to the respective facility exhaust air system.
Manual diversion shall be allowed during maintenance on the system.
A minimum of seven air changes an hour shall be maintained in contaminated areas.
)
Unless safety concerns override, the average air velocity through openings in uranium handling hoods, with exception of laboratory hoods, and equipment containing readily j
f' dispersible uranium shall be average of 125 LFPM (linear feet / min) t15% a The 1
chall be checked at least monthly.
! Both general recirculation and exhaust air system HEPA filter installations shall be l equipped with continuous pressure differential measuring and indicating systems whose readings shall be recorded at least monthly. The differential pressure across i the final HEPA filters shall not exceed four inches of water gauge. The final HEPA filter installations shall also be checked prior to first use for efficiency against 0.8 4
micron particles and must meet or exceed a removal efficiency of 99.95 percent.
3.2.3 Work Area Air Samolina i
' 'In areas where unencapsulated radioactive materials are handled, processed, and/or air concentrations are likely to exceed 10 percent of DAC, air shall be routinely monitored. Fixed air sampling heads may be used for calculating DAC-hours in arees where internal dose monitoring is required. Air sample concentrations determined by fixed samplers may be modified by correction factors.
l Specialized air sampling or monitoring equipment, such as continuous air monitors, portable, high volume, and/or lapel air samplers, shall be available to supplement the j
normal air sampling system, and for use in studies or work on special problems.
i f
I l
l t
I l
l' j
! AMENOMENT APPLICATON DATE:
PAGE NO.:
l June 9,1997 34 i
SPC-ND 3330 947 (R UO792)
{
i l
Siemens Power Corporation - Nuclear Divi::lon J
eur.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257 l
i l
PART I-LICENSE CONDmONS REV.
. 36 i-i shall be permitted provided a personnel survey is performed first.
4 Additional step-off areas may be established for maintenance work, temporary i
situations or conditions, or to accommodate personnel entry and exit not requiring the i
use of change room facilities. Personnel survey requirements shall be adhered to at all l step-off areas.
I l
3.2.1.4 Protective Clothing j
4 l
Protective clothing shall be provided for personnel entering contamination controlled i
j areas. The type (s) of clothing required shall be consistent with the individual's work I l
j assignment and is dependent upon the type and level of contamination anticipated.
1 l
l Used protective clothing shall be removed prior to entering clean areas from
~
contaminated areas, with the exception of emergency evacuations or if specifically j
{
authorized by a Radiation Work Procedure.
)
3.2.1.5 Personnel Surveys i
j Personnel survey instruments shall be provided in change rooms and at step off pads l
I i for use by personnel leaving contaminated areas. Personnel exiting contaminated
}
arens shall be required to survey thumselves after removing their protective clothing J
prior to leaving the step off area. An exception to survey requirements is exiting l
i during emergency evacuations.
l i
i l
l 3.2.2 Ventilation J.
General ventilation systems shall be designed and maintained to limit the spread of l airborne contamination by maintaining air pressure gradients and airflows from general areas of low potetial airbome contamination to general areas of higher potential contamination. Where ventilation barriers exist between areas, these systems shall be balanced so that the air pressure differentists between clean and contaminated areas
{
are maintained at a minimum of 0.05 inch of water.
Air locks shall be installed, where necessary, to insure maintenance of proper air pressure differentials. Installed differential air pressure measuring instrument readings shall be recorded at least monthly.
Monthly smoke tests shall be conducted to visually demonstrate that the airflows are from general areas of low contamination potential to general areas of higher contamination potential.
General recirculating air systems shall recirculate air only from room areas (not from f
a
- AMENOMENT APPUCATON DATE:
PAGE NO.:
October 28.19g6 3-3 sPC.No2330.947 (R.uo7/92) e
d 4
- Siemens Power Corporation ~- Nuclear Division EMF 2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 701257 -
PART I-LICENSE CONDITIONS ggy.
v t
i process enclosures) and pass it through fire retardant HEPA filters, which have-installed efficiencies of at least 99.95% for 0.8 micron particles, before returning it to the room.
l In addition to general ventilation systems, SPC may employ local ventilation units designed to recirculate room air through HEPA filters, and then discharge room air at low velocities, to minimize the airborne concentrations in breathing zones.
q Recirculated air, excluding that from the local ventilation units described above, shall be continuously monitored prior to the final stage of HEPA filtration. An indication that airborne levels are such that a 40 DAC-hour (derived air concentration-hour) exposure could be realized in a week from the recirculated air shall automatically i
divert the air from the recirculation mode to the respective facility exhaust air system.
', Manual diversion shall be allowed during maintenance on the system.
t A minimum of seven air changes an hour shall be maintained in contaminated areas.
i Unless safety concerns override, the average air velocity through openings in uranium handling hoods, with exception of laboratory hoods, and equipment containing readily i
l dispersible uranium shall be average of 125 LFPM (linear feet / min) 115%
The l average flow through laboratory hoods shall be 100 LFPM 15E These velocities chall be checked at least monthly.
i Both general recirculation and exhaust air system HEPA filter installations shall be
} equipped with continuous pressure differential measuring and indicating systems whose readings shall be recorded at least monthly. The differential pressure across the final HEPA filters shall not exceed four inches of water gauge. The final HEPA filter installations shall also be checked prior to first use for efficiency against 0.8 micron particles and must meet or exceed a removal efficiency of 99.95 percent.
4 3.2.3 Work Area Air Samplina i
f in areas where unencapsulated radioactive materials are handled, processed, and/or air
! concentrations cre likely to exceed 10 percent of DAC, air shall be routinely monitored. Fixed air sampling heads may be used for calculating DAC-hours in areas where internal done monitoring is required. Air sample concentrations determined by fixed samplers may be modified by correction factors.
Specialized air samoling or monitoring equipment, such as continuous air monitors,
{ portable, high volume, and/or lapel air samplers, shall be available to supplement the
^
' normal air sampling system, and for use in studies or work on special problems.
I.
i
{
. i 1
{ AMENDMENT APPLCATIONDATE:
PAGE NO.:
l June 9,1997 3-4 SPC-ND 3330 947 (R 1<07132)
4 n
Glem::ns Power Corporation - Nuclear Division EMF 2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257
{
i nev. l 4
PART I-LICENSE CONDITIONS 36 i
4 shall be permitted provided a personnel survey is performed first.
I l
i i
i Additional step-off areas may be established for maintenance work, temporary j
situations or conditions, or to accommodate personnel entry and exit not requiring the t
use of change room facilities. Personnel survey requirements shall be adhered to at all
}
l l
step-off areas.
i e
i e
3.2.1.4 Protective Clothina i
Protective clothing shall be provided for personnel entering contamination controlled l
areas. The type (s) of ciothing required shall be consistent with the individual's work j
assignment and is dependent upon the type and level of contamination anticipated.
1 i
Used protective clothing shall be removed prior to entering clean areas from l
i contaminated areas, with the exception of emergency evacuations or if specifically l
authorized by a Radiation Work Procedure.
I i
{
3.2.1.5 Personnel Surveys i
Personnel survey instruments shall be provided in change roo'ms and at step off pads '.
[
i for use by personnel leaving contaminated areas. Personnel exiting contaminated l areas shall be required to survey themselves after removing their protective clothing l
l prior to leaving the step-off area. An exception to survey requirements is exiting i
during emergency evacuations.
l l
j l
3.2.2 Ventilation I
General ventilation systems shall be designed and maintained to limit the spread of l
airbome contamination by maintaining air pressure gradients and airflows from general areas of low potential airborne contamination to general areas of higher potential 1
contamination. Where ventilation barriers exist between areas, these systems shall be balanced so that the air pressure differentials between clean and contaminated areas are maintained at a minimum of 0.05 inch of water.
I Air locks shall be installed, where necessary, to insure maintenance of proper air pressure differentials. Installed differential air pressure measuring instrument readings shall be recorded at least monthly.
Monthly smoke tests shall be conducted to visually demonstrate that the airflows are
' from general areas of low contamination potential to general areas of higher contamination potential.
J
\\
General recirculating air systems shall recirculate air only from room areas (not from maasm more om:
nos m; October 28.1996 3-3 sPC.No2330.947 (Rac7/92)
Siemens Power Corporation - Nuclear Division egg.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 701257 PART1 - LICENSE CONDITIONS
- nev, process enclosures) and pass it through fire retardant HEPA filters, which have installed efficiencies of at least 99.95% for O.8 micron particles, before returning it to the room.
In addition to general ventilation systems, SPC may employ local ventilation units designed to recirculate room air through HEPA filters, and then discharge room air at low velocities, to minimize the airborne concentrations in breathing zones.
Recirculated air, excluding that from the local ventilation units described above, shall be continuously monitored prior to the final stage of HEPA filtration. An indication that airborne levels are such that a 40 DAC-hour (derived air concentration-hour) exposure could be realized in a week from the recirculated air shall automatically divert the air from the recirculation mode to the respective facility exhaust air system.
,' Manual diversion shall be allowed during maintenance on the system.
I A minimum of seven air changes an hour shall be maintained in contaminated areas, i
Unless safety concems override, the average air velocity through openings in uranium i
handling hoods, with exception of laboratory hoods, and equipment containing readily j dispersible uranium shall be average of 125 LFPM (linear feet / min) :.15%.
The
- average flow through laboratory hoods shall be 100 LFPM 15%. These velocities chall be checked at least monthly, i
, Both general recirculation and exhaust air system HEPA filter insta.lations shall be
} equipped with continuous pressure differential measuring and indi: sting systems whose readings shall be recorded at least monthly. The differential r.ressure across the final HEPA filters shall not exceed four inches of water gauge. The final HEPA filter installations shall also be checked prior to first use for efficiency against 0.8 micron particles and must meet or exceed a removal efficiency of 99.95 percent.
3.2.3 Work Area Air Samplina I in areas where unencapsulated radioactive materials are handled, processed, and/or air concentrations are likely to exceed 10 percent of DAC, air shall be routinely monitored. Fixed air sampling heads may be used for calculating DAC hours in areas where internal dose monitoring is required. Air sample concentrations determined by fixed samplers may be modified by correction factors.
- Specialized air sampling or monitoring equipment, such as continuous air monitors, i portable, high volume, and/or lapel air samplers, shall be available to supplement the
- normal air sampling system, and for use in studies or work on special problems.
. AMENOMENT APPLCATION DATE:
l PAGE No; j
June 9,1997 3-4 sPc-ND 3330 947 (R-1/07$2)
SI:m:ns Power Corporation - Nuclear Division sue.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257 I
i nev. l PARTI-LICENSE CONDITIONS I
36 i
i l
shall be permitted provided a personnel survey is performed first.
I l
i Additional step-off areas may be established for maintenance work, temporary i l
situations or conditions, or to accommodate personnel entry and exit not requiring the l
l use of change room facilities. Personnel survey requirements shall be adhered to at all l
l step-off areas, i
3.2.1.4 EC2tactive Clothina Protective clothing shall be provided for personnel entering contamination controlled areas. The type (s) of clothing required shall be censistent with the individual's work assignment and is dependent upon the type and level of contamination anticipated.
Used protective clothing shall be removed prior to entering clean areas from contaminated areas, with the exception of emergency evacuations or if specifically I authorized by a Radiation Work Procedure.
l l
3.2.1.5 Personnel Surveys l
- Personnel survey instruments shall be provided in change rooms and at step off pads l
i for use by personnel leaving contaminated arcas. Personnel exiting contaminated l areas shall be required to survey themselves after removing their protective clothing I
l prior to leaving the step-off area. An exception to survey requirements is exiting l
l during emergency evacuations.
i I
3.2.2 Ventilation 4
b General ventilation systems shall be designed and maintained to limit the spread of l
l I
airborne contamination by maintaining air pressure gradients and airflows from general areas of low potential airbome contamination to general areas of higher potential contamination. Where ventitation barriers exist between areas, these systems shall be balanced so that the air oressure differentials between clean and contaminated areas are maintained at a minimum of 0.05 inch of water.
Air locks shall be installed, where necessary, to insure maintenance of proper air pressure differentials. Installed differential air pressure measuring instrument readings shall be recorded at least monthly.
Monthly smoke tests shall be conducted to visually demonstrate that the airflows are from general areas of low contamination potential to general areas of higher contamination potential.
i i
l General recirculating air systems shall recirculate air only from room areas (not from 7
- AMENOMENT APPLCATION DATE:
PAGE NO,:
l October 28,1996 3-3 sPC-No:3330.947 (R-1974h
s.
i Siemens Power Corporation - Nuclear Division sup.2 SPECIAL NUCLEAR MATERIAL LICENSE NO. SNM-1227, NRC DOCKET NO. 70-1257 i
t PART I-LICENSE CONDITIONS agv.
l
[
i l
process enclosures) and pass it through fire retardant HEPA filters, which have l
installed efficiencies of at least 99.95% for O.8 micron particles, before returning it to l
the room.
in addition to general ventilation systems, SPC may employ ' local ventilation ~ units y
designed to recirculate room air through HEPA filters, and then discharge room air at low velocities, to minimize the airborne concentrations in breathing zones.
Recirculated air, excluding that from the local ventilation units described above, shall be continuously monitored prior to the final stage of HEPA filtration. An indication that airborne levels are such that a 40 DAC-hour (derived air concentration-hour) i
- exposure could be realized in a week from the recirculated air shall automatically j
l divert the air from the recirculation mode to the respective facility exhaust air system.
', Manual diversion shall be allowed during maintenance on the system.
i A minimum of seven air changes an hour shall be maintained in contaminated areas, i
Unless safety concems override, the average air velocity through openings in uranium I
handling hoods, with exception of laboratory hoods, and equipment containing readily f' dispersible uranium'shall be average of 125 LFPM (linear feet / min) i15%
The average flow through laboratory hoods shall be 100 LFPM i15E These velocities
{
l chall be checked at least monthly.
i Both' general recirculation and exhaust air system HEPA filter installations shall be i
! equipped with continuous pressure differential measuring and indicating systems whose readings shall be recorded at least monthly. The differential pressure across I the final HEPA filters shall not exceed four inches of water gauge. The final HEPA filter installations shall also be checked prior to first use for efficiency against 0.8 micron particles and must meet or exceed a removal efficiency of 99.95 percent.
3.2.3 Work Area Air Samolina 4
l In areas where unencapsulated radioactive materials are handled, processed, and/or air concentrations are likely to exceed 10 percent of DAC, air shall be routinely monitored. Fixed air sampling heads may be used for calculating DAC-hours in areas where intomal dose monitoring is required. Air sample concentrations determined by l
fixed samplers may be modified by correction factors.
l l
Specialized air sampling or monitoring equipment, such as continuous air monitors, I portable, high volume, and/or lapel air samplers, shall be available to supplement the
- normal air sampling system, and for use in studies or work on special problems.
i l
i i
8 1
i AMENOMENT APPUCATON DATE:
PAGE No.:
I June 9,1997 3-4 sPC-ND.3330 947 (R 1,0792)
--n
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.n
-.. - - - - - - - _ -, - - - - - -. - - - -