ML20023C370

Replacement Pages,To PMP 2081.EPP.027, Unit Vent Emergency Release Rate Determination.

ML20023C370
Person / Time
Site:	Cook
Issue date:	04/29/1983
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML20023C367	List: ML20023C366 ML20023C370
References
PMP-2081.EPP.02, PMP-2081.EPP.2, NUDOCS 8305170274
Download: ML20023C370 (7)

Text

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INDIANA & MICHIGAN ELECTRIC COMPANY DONALD C. COOK NUCLEAR PLANT O Instruction or Procedure Temporary Sheet This temporary sheet applies to WORARY DETERMINATION SHEET NO.

Instruction or Procedure No. PMP 2081.EPP.027 Revision No. O TP-1 The following change ( )( ) new requirement ( ) hall be 29 Aoril, 1983 instituted effective (Date) ,

REPLACE the following pages as indicated:

List of Effective Pages, Page 1 of 1, Revision 0 with Revision 0, TP-1 Page 1 of 9, Revision 0 with Page 1 of 9, Revision 0, TP-1 Page 2 of 9, Revision 0 with Page 2 of 9, Revision 0, TP-1 Page 3 of 9, Revision 0 with Pages 3 of 9 and 3A of 9, Revision 0, TP-1 DCR O

TsPR 391933 I

REASON FOR CHANGE: Include provision for obtaining sample of materials in the Unit Vent.

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This change should be made a permanent revisisn to tiie Instruction or Procedure:

p(YES ONO a NOT KNOWN, additional review required 1

i Expiration Date: PR0fFnURE REVTSTON Standard Dist. List NO.:

Originator: OAdb/& Distribution:

Marugement Staff: N k8hWV Senior Reactor tor: b [ M //ee b .

PNS $ . Date W 4/.f3 Plant Manageri'lldutM Cate Yh4[M f/

Form No. 4330 arvtszD 7/7s WHITE - ORIGIN AL CANARY - ORIGINATOR COPY 0305170274 830419 PINK - WORKING COPY PDR ADOCK 05000315 F PDR

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PMP 2081.EPP.027 9

<-s kJ LIST OF EFFECTIVE PAGES

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Paae Number Revision Number and Date

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. . Revision 0 - TP -

2 of 9 Revision 0 TP-1 3 of 9 Revision 0 TP-1 3A of 9 . Revision 0 - TP-1 4 of 9 EXHIBIT A Revision 0 3-1-83 5 of 9 EXHIBIT'B Revision 0 3-1-83 6 of 9 EXHIBIT C Revision 0 3-1-83

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7 of 9 EXHIBIT D Revision 0 3-1-83 8 of 9 EXHIBIT E Revision 0 1-83 9 of 9 EXHIBIT F _ Revision 0 3-1-83 c

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Page 1 of 1 Revision 0, TP-1 it

PMP 2081.EPP.027 O INDIANA & MICHIGAN ELECTRIC COMPANY DONALD C. COOK NUCLEAR PLANT UNIT VENT EMERGENCY RELEASE LEVEL DETERMINATION

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. PURPOSE-1.1 The purpose of this procedure is to provide guidance in deter-mination of concentrations and release rates of radioactive TP-1 material at the Auxiliary Building Unit Vent.

2.0 REFERENCES

2.1 Figure 1, Vent Stack Sampling Lines, AEPSC drawing supplied by P. K. Eapen.

2.2 Computer Program Output; Job #2001 NSLSSTOP; 13 March,1980, 9 :28 p.m.

3.0 INITIAL CONDITIONS 3.1 R-26 has reached or is expected to reach full scale indication.

O 3.2 It has been detemined by the Shift Supervisor, Plant Radiation Protection Supervisor, their designees, or other responsible plant staff personnel , that additional infomation on the poten-tial releases through the plant vent is needed.

4.0 PRECAUTIONS 4.1 Very high dose rates and high levels of airborne radioactivity may be present in unexpected locations in the Auxiliary Building.

l Precautions to keep internal and external exposure to a minimum

! shall be taken. These may include, but are not limited to the following precautions:

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l 4.1.1 At least two individuals shall be sent when there is l doubt about the radiological conditions in the Auxiliary Buil ding .

4.1.2 At least one functioning high range dose-rate instrument l

shall be available at all times. This nomally means carrying a suitable spare instrument.

4.1.3 The instruments used for survey may be either GM or Ion Chamber type. If an instrument with a sealed chamber (such as the PIC-6A) is not available, an RM-16 with bullet probe may be used. 1 0 Page 1 of 9 Revision 0, TP-1

PMP 2081.EPP.027 Q 4.1.4 Nomally, if vent release conditions are serious enough to require activation of this procedure, airborne condi-tions in the Auxiliary Building would require the use of pressure demand type supplied air respirators by all personnel involved.

4.2- Sampling media used to obtain grab samples of the Unit Vent -

could became a significant source of external exposure. Survey 'TP-1 the sample holder prior to renoving or transporting.

5.0 ' ENVIR0lWENTAL~ CONDITIONS 5.1 In all cases involving a significant increase in airborne acti-vity, licensed Control Room personnel should consult PMP 2080 EPP.001, ECC-19 and ECC-13 to detennine if any emergency action levels (EAL's) have been exceeded. Upon exceeding an EAL, the proper emcrgency condition shall be declared and the Emergency Plan activated by implementing PMP 2080 EPP.001.

6.0 PROCEDURE 6.1 Obtain portable esmunication radio from the Technical Support Center, Control Room or an Emergency Station. Survey data taken at the sample station should be transmitted to the Control Room every fifteen (15) minutes.

Q NOTE: Communication can also be made to the Technical Support Center and Operational Support Center, if necessary or desired .

6.2 Obtain calibrated, operable, dose-rate reading instruments.

This should include, if possible, an RM-16 (2 mR/hr to 20 R/hr) with bullet probe. If the range of the RM-16 is expected to be exceeded, a PIC-6A (1 mR/hr to 1000 R/hr) survey instrument from an emergency station should be obtained for use.

6.3 Carefully proceed to the 650' elevation sample station.

9.4 Obtain dose rate measuranents from the shielded vent stack sample lines as follows. TP-1 6.4.1 Remove the shield plug and insert the detecter so that it is 6 inches fram the sample line inside the shield.

For exact positioning of instruments, see Figure 2 for PIC-6A, or Figure 3 for RM-16 bullet probe.

6.4.2 If RM-16 with bullet probe is used in shield, slide lead plug up against bullet probe retainer to minimize radia-tion shine from sample line.

O Page 2 of 9 Revision 0, TP-1

PMP 2081.EPP.027 O 6.4.3 Open the rmote operated sample valves and start the sample pump (controls are located near the sample station).

6.4.4 Obtain a reading on the survey instrument.

6.4.5 Using Attachment #1, detennine the Activity Factor at Time After Event. -

NOTE 1: Computer program CPM.002 may be used instead of steps 6.8 through 6.12.

NOTE 2i The Activity Factors of Attachment #1 correspond to one (1) R/hr at six inches from the sample line (activity factor units ). The concentration required to give 1 R/hr will change with time. It is important that Attachment #1 be referenced frequently to insure that the proper activity factor is used.

6.4.6 Calculate the Unit Vent Release Concentration by multi-plying the measured R/hr at the sample station times the activity factor.

6.4.7 Calculate the Unit Vent Release Rate by multiplying the release concentration times the unit vent flowrate (in CFM) times 4.72E-4.

O EXAMPLE:

2.5 R/hr 9 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (1 day)

Activity Factor = 5.2E3 Release Concentration = (2.5)(5.2E3)

= 1.3E4 uCi/cc Release Rate = (1.3E4)(50,000 CFM)(4.72E-4)

= 3.lE5 C1/sec 6.4.8 When completed , turn sample pump 0FF, close valves, renove survey instruments and replace shield plug.

6.4.9 To detennine Release Concentration and Release Rate of Total Iodine and Iodine 131, obtain Iodine Fraction from Attachment #2. Then multiply the Iodine Fraction times values from 6.4.6 and 6.4.7 from Attachment #2 and #3.

6.5 Obtain samples of the vent stack as follows:

6.5.1 Install the particulate and iodine sampling rig at the sampling barbs on SM-61 and SM-62. Inlet side toward TP-1 the inlet valve, SM-62. Valves are located next te the tritium sample rack associated with the vent stack SPING monitors.

O Page 3 of 9 Revision 0, TP-1

• PMP 2081.EPP.027 Q NOTE: When sample valves are open, the valve handles will be aligned to indicate the direction of the sample flow, 6.5.2 Place the LOCAL /REN0TE switch to LOCAL.

. -6.5.2 Place the NORMAL / MANUAL / AUTO switch to MANUAL, record .

sample start time.

NOTE: Positioning the switch to MANUAL starts the sampling pump and aligns vent stack sampling flow through the grab sample connections.

6.5.3 Record the sample flow rate from the sample flow rate TP-1 indicator (VFI 1524 in Unit 1, VFI 2524 in Unit 2).

6.5.4 When sampling is complete, place the NORMAL / MANUAL /AUT0 switch in NORMAL, record the sample stop time.

6.5.5 Place the LOCAL /REN0TE switch in REMOTE.

6.5.6 Shut sampling valves SM-61 and SM-62.

6.5.7 Deliver the samples to the location specified by the 0.S.A. or T.S.C. for sample analysis.

O O 7.0 FINAL CONDITIONS 7.1 Record data obtained in appropriate logs.

7.2 Inform the Shift Supervisor and/or Plant Radiation Protection Supervisor of results and any personnel cxposure or unusual conditions noted in the Auxiliary Building.

Page 3A of 9 Revision 0, TP-1

. PMP EPP INDEX O)

(. INDIANA & MICHIGAtl 90' DER COMPAtlY DONALD C. COOK NUCLEAR PLAtlT PLANT MANAGER PROCEDURE

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Index

' Identification Ti tie -Revision-No.1 Cements Number And Date l PMP 2081 EPP.025 Activation and Operation of Revision 1 the Emergency News Source 6-24-82 (ENS) (An Emergency Operations Facility}

EPP.026 Use of Stable Iodine for Revision 1 Thyroid Blocking During a 9-8-82 Radiation Emergency EPP.027 Unit Vent Emergency Release Revision D TP-1,4-29-83 Exp NA Level Determination 3-1-83 I

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i Page 4 Rev. Data 9-$9-83

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