ML20041G278
| ML20041G278 | |
| Person / Time | |
|---|---|
| Site: | 07002884 |
| Issue date: | 01/11/1982 |
| From: | LONG ISLAND LIGHTING CO. |
| To: | |
| Shared Package | |
| ML20041G264 | List: |
| References | |
| 20330, 62.020.01, NUDOCS 8203190500 | |
| Download: ML20041G278 (5) | |
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GEt;ERAL CO.' TA:IIt!ATIUG SUiU!di TEChJICJ S 1.0 PURPOSE To provide instructions for station personnel to safely and efficiently perform a conta:aination survey.
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2.0 RESPONSIBILITY The licalth Physics Engineer shall be responsible for assuring implementation of the requirements of this procedure.
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2.0 DISCUSSION 3.1 A Contamination Survey is used to determine the presence of radioactive material, and if found, determine the types, levels, and locations of the radioactive naterial deposited. This information is then used to properly post the area, fill out RWP's and/or update the plant's radiological status in order to meet the station's policy of keeping radiation exposures "A LA RA".
3.2 Topics covered in this procedure include:
Page 8.1 Smearable Contamination Surveys 3
8.2 Fixed Contamination Surveys 4
4.0 PRECAUTIONS 4.1 The surveyor should be aware of his accumulated dose at all times during a survey. lie should keep his dose ALARA by utilizing available shielding and remaining in radiation fields only as long as absolutely necessary.
4.2 A minimum of two peopic should be used in areas where respiratory protection is required, unless otherwis; apecified by ilealth Physics Supervision.
4.3 The surveyor should never smear behind machinery guards of equipeant in service or near moving machinery.
5.0 PREREQUISITES 5.1 The surveyor shall be qualified in "D 71SIL !" of u:ermee i...
5.2 T'
m n me't s., p l y un rawirments M applicable pusted s...
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5.3 If at all possible, the surveyor should obtain information about the area such as expected radiation and contamination l eve l s,,
li hting conditions, :
g and safety hazards.
6.0 LIMITATIONS AND ACTIONS N/A 7.0 t1ATERIALS AND TEST EQUIPMENT 7.1 Sufficient quantity of identified smears.
7.2 Identified envelopes or smear holders.
7.3 Appropriate portable survey instrument (fi):cd contamination surveys) in accordance with Reference 11.2.
7.4 1 dram vial.
SP 62.020.01 Rev. 4 7/23/77 Page 2
7.5 Disposable pipet.
b.0 PROCEDURC 8.1 Smearable Contanination Surveys b.1.1 For relatively dry surfaces the surveyur should proceed as follows:
8.1.1.1 0btain a Radiological Survey Sheet (SPF62.919.Wl-1).
8.1.1.2 Assure that the smear is identified.
at 8.1.1.3 Wipe an area of 100 cm2 (approximately 4 x 4 inches) with a disc smear _(Later).
8.1.1.4 Place the sir. car in a properly identified envelope or scear holder.
8.1.1.5 Repeat as necessary until all areas of concern have been smeared.
8.1.1.6-Take the smears to,the appropriate equipment to be scr-
.n-a t'>
.....,.:..a:;ey zan :c in 8.1.2 Tne surveyor may use*one of the following nethods for qualitative analysis of large areas and equipment in restricted areas to determine if there is a need for further investigation (quantitative
- al'jsis aith disc sr ears).
8.1.2.l Masslinn Cloth Surveys
.1 Wipe a large area (should not be reater than l',4) ft.2) with the cloth. A cop attachment cay be used for floors and walls.
.2 Take the mop and/or clath to a low background area taking care not to spread the potential contamination and survey with a GM survey instrument.
If the detector has a beta shield, survey with the shield open.
.3 If negligible activity (above background) is detected it may be assumed that the area surveyed is less than 2
5JW dem/190 cm,
F
.4 If significant activity is detected, the area and/or 2
equipment shall be considered to be > 50% dpm/190 cm j
until a survey has been conducted in accordance with section 8.1.1 or 8.1.3,f *.his procedure.
SP 62.020.01 Hev. 4 7/26/77 Page 3
o.l.2.2 Swipe Surveys
.1 Wipe a large area (should not be greater than 25 ft.') with a paper towel or acc ic wipe.
.2 Take the swipe to a lov backgrouna area and survey with a G1 survey instrunent.
If the detector has a beta shield, sutvey with the shield open.
.3 If negligible activity (over background) is detected it may be assuced that the area surveyed is less than 2
500 dpa/100 cm,
i 4 If significant activity is detected the area and/or equipment shall be considered to be > 500 dpc/ldd cm until a survey has been conducted in accordance with section 8.1.1 or B.1.3 of this procedure.
3.l.3 For surfaces that are wet the surveyor should:
d.1.3.1 Obtain a Radiological Survey Sheet (SPF62.010.01-1).
to obtain a 2 al. liquid sacple in a 1 drac vial.
- mt n: be acconplished with a disposable pipet and
. mich can pick up liquid fro: snall
~~ - in :he surface.
d.l.3.3 If any areas of the surface have drained or begun to dry, the surveyor should consider scearing these areas in accordance with S.I.1 of this procedure.
8.1.3.4 Assure that the smears and vials are identified properly.
d.l.3.5 Take the vials and smears to tne appropriate equipment to be processed.
8.1.3.6 Record the reading on the Radiole'gical Survey Sheet.
4 8.2 Fixed Contamination Surveys I
NOTE:
Surveys of.this type should only be perforced on surfaces that have no significant smearable contamination and in areas where there is no significant background radiation.
8.2.1 Obtain a Radiological Survey Sheet (SPF 62.010.01-1).
8.2.2 Obtain the appropriate portable survey instrument in accordance with Reference 11.2.
3.2.3 Check the instrument for response, accuracy, and proper cpar tion in accordance with it's Station Procedure.
4 S a' 62.020.01 Rev. 0 7/26/77 Page 4 i
6.2.4 Place the detector in near contact with surfaces to be aurveyed.
The probe may be as nuch as '/2 ta ! :nca ab ov, tN sur: ace for
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octa.ind ganna activity 21: shoule not ue,0re : nan !/-.
tr.c" acove the surface for alpna surcuys.
2.OTE : Tnere should he no.ater 2n surin e (;;r a.a or alpi. i surveys) as tnis
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6.2.5 Record the inattv-.: re !iap e..
.e. e :. i:io.: mrve she2: as nren/hr.
Inc luda op.:n and O.' n l ;
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9.0 ACCEPTAi4CE CRITERIA e
t./a 10.0 FINAL CO:4DITIO;iS 10.1 The Radiological Survey Sheet (SPF c2.013.01-1) shall be ccep'.ated as applicable and filed in the appropriate locations (later).
10.2 Observe any postings in the area and report any discrepar.cies between the posting and the newly conoucted survey to Health Physics Supervision.
10.3 For unposted areas, notify liealtn Physics Supervision f or 'a'atch Engineer if no IIP is available) of any contamination levels in excess of the limits specified in Reference 11.4
!!.0 REFERE:lCES 11.1 3F 6 i. '. '. 1 e a l ti. i'hys ics Tecnnic i nn Oc11 !:!:st i -".r:;r.,
1 11.2 Se o -
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.. :-.2n:a 11.;
Se oz.. a.dl, vene ra l nad ia t ion Su rvey Techniques, Appe,ndix 12.1 11.4 SP 61.02).03, Cont anination Area Des ignations and Signs
- 12.0
. APPENDICES N/A SP 62.020.01 dev. 0 7/23/77 Page 5
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