IR 05000275/1992029
| ML16342B919 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 09/28/1992 |
| From: | Coblentz L, Reese J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML16341G716 | List: |
| References | |
| 50-275-92-29, 50-323-92-29, NUDOCS 9210190024 | |
| Download: ML16342B919 (26) | |
Text
U. S.
NUCLEAR REGULATORY COMMISSION Report:
Licenses:
I Licensee:
Facility:
REGION V
50-275/92-29 and 50-323/92-29 DPR-80 and DPR-82 Pacific Gas 5 Electiic Company 77 Beale Street, Room 1451 San Francisco, California 94106 Diablo Canyon Power Plant (DCPP)
Location of Meeting:
Walnut Creek, California Date of Meeting:
Prepared by:
Approved by:
~sussaar:
September 10, 1992 o
entz, Se 9'
c.
latlon Spec a 1st a e lgne am ac
D te sgne H. Reese, C se r Radiological Protection Branch Areas Reviewed:
Previously announced management meeting, held at the licensee's request, to discuss the status of the licensee's proposed
.
modifications to plant radiation monitors.
Inspection procedure 30702 was used.
Results:
The licens'ee's self-'assessment of needed monitor upgrades,and proposals for'ecessary interim monitoring methods, in the aspects discussed, were aggressive and technically sound.
In addition, the licensee had analyzed the impact of both temporary and permanent changes on the effluent monitoring program and on the DCPP emergency plan.
The licensee's analyses, in the aspects discussed, were probing and thorough.
III 92101'70024 920'F28 PDR ADOCK 05000275
~
DETAILS 1.
Persons Attendin Licensee D. Behnke, Regulatory Compliance D. Gardner, Chemistry R. Kohout, Safety, Health, and Emergency Planning Services D. Nat sh, Nuclear Operations Support S.
Mood, Consultant, Emergency Planning QRC L. Coblentz, Senior Radiation Specialist G.
Good, Emergency Preparedness Analyst N. Namish,'adiation Specialist A. Ncgueen, Emergency Preparedness Analyst J.
Reese, Chief, Reactor Radiological Protection Branch 2. Neetin Details 30702 The individuals listed in Section 1, above, met on September 10, 1992, to discuss the status of the licensee's modifications to Diablo Canyon Power Plant radiation monitors.
J; Reese began by introducing the topic of discussion as the licensee's Radiation Nonitoring System (RNS) upgrades.
Nr. Reese then opened the meeting for the licensee's presentation.
a.
Im act of RNS U
rades on Effluent Nonitorin J.
Gardner discussed the various phases of implementation of the RNS upgrade.
Nr. Gardner specifically addressed the anticipated effects on effluent monitoring and on containment ventilation isolation (CVI)
capability (see Attachment 1).
Several questions were raised by NRC personnel comparing the proposed interim monitoring methods to current monitor ranges, efficiencies, sensitivity to airborne particulates, and other capabilities.
In addition, the NRC asked what measures were in place to ensure that periods of monitor inoperability would be, controlled as required by technical specifications.
The licensee's responses were technically sound, and indicated that interim. measures had been conservatively designed to provide, in each case, the required monitorwg capabilities.
b.
Im act of RNS U
rades on the Emer enc Plan S.
Wood discussed the various phases of implementation of the RNS upgrade in relation to the licensee's Emergency Plan and emergency procedures.
Nr. Wood also presented a written evaluation of the proposed changes, performed in a manner consistent with 10 CFR 50.54(q),
regarding the impact of the changes on the Emergency Pla The NRC again raised several questions, regarding anticipated revisions to the Emergency plan, impact of the upgrades on the Emergency Response Data System (ERDS),
and control of inputs to the Emergency Assessment and Response System (EARS).
As before, the licensee's responses indicated that previous analyses had been technically sound, and that the RNS upgrade implementation had been planned in a conservative manner.
Neetin Closure and Conclusion.
In summary, no significant problems were identified with the
. licensee's proposed phases of implementation or with interim measures for ensuring monitoring capability.
Nr. Reese closed the meeting by expressing appreciation for the licensee's presentatio DCPP RADIATIONMONITORING SYSTEM UPGRADE (BLI-063)
PLANT VENT AND CONTAINMENTPURGE SUBSYSTEMS OVERVlEW:
.
o PHASED INSTALLATIONOF UNIT-1 AND UNIT-2 PLANT VENT (PV) SYSTEMS WILLREQUIRE INTERIM CHANGES TO EMERGENCY. PLAN AND EFFLUENT MONITORING PROGRAM.
o tNSTALLATIONPROCESS WILLENTAILFOUR DISCRETE PHASES FOR PURPOSES OF EMERGENCY PLAN AND EFFLUENT MONITORING PROGRAM IMPLEMENTATION:
1. UNIT-1 SYSTEM INSTALLATION; 2. UNIT-1 SYSTEM OPERATIONAL, UNIT-2 OPERATING WITH EXISTING EQUIPMENT; 3. UNIT-2 SYSTEM INSTALLATION; 4. ONITS 1 Ec 2 VICTOREEN PY SYSTEMS BOTH OPERATIONAL (FINAL CONF!GURATION).
Attachment 1,
Page
IMPACT ON EFFLUENT MONITORING PROGRAM PHASE 1: UNlT-1 SYSTEM INSTALLATlON (9/21/92 - 12/16/92)
o EXISTING 1RIVl-14A 5, B CLASS-1E CABLING WILL BE USED FOR THE NEW CVI ACTUATION MONITORS (1RM-44A 5 8).
o WHEN CVI ACTUATIONIS ASSUMED BY
'1RIVI44A/B,'EXISTINGNORIVIALRANGE PLANT VENT MONITORS WILLBE INOPERABLE.
'I o
LAG TIME UNTILVICTOREEN PLANT VENT SYSTEM IS OPERABLE WILL BE APPROXIMATELY NINE WEEKS.
ACTIONS:
o INTERllVIUSE OF IVIID-RANGEPV IVIONITOR 1RIVI-33 IN-LIEU OF 1RIVI-14A 8c 8:
1.
HIGH ALARMSETPOINT CHANGE 2. 'GASEOUS RADWASTE DISCHARGE (GFNf)
PROCEDURE REVISION 3.
CHANGE INPUTS TO GRW SOFTWARE 4.
EQUIPMENT CONTROL GUIDELINES (EGGS)
Attachment 1,
Page
IMPACT ON EFFLUENT MONITORING PROGRAM PHASE 2: UNIT-1 VICTOREEN SYSTEM OPERATING, UNIT-2 OPERATING WITH EXISTING SYSTEIVI (12/92 - 2/93)
ACTIONS:
o UNIT DIFFERENCES IN THE FOLLOWING:
1. HIGH ALARMSETPOINTS - SAME BASIS, DIFFERENT VALUES; 2. GRW PROCEDURE REVISION 3. PV MONITOR INPUTS TO GRW SOFTWARE CHANGED TO ACCEPT 1RIVl14 8c14R Attachment 1,
Page
IMPACT ON EFFLUENT MONITORING PROGRAM PHASE 3: UNIT-2 VICTOREEN PV SYSTEM INSTALLATION (2/93 - 3/93)
ACTIONS:
o THE ACTIONS GIVEN ABOVE FOR PHASE t WILLBE INSTITUTED FOR UNIT-2 IF NECESSARY.
t o
LESSONS LEARNED DURING UNIT-1 INSTALLATION PHASE MAYENABLE A MORE RAPID TRANSITION BETWEEN EXISTING AND NEW MONITORS.
o IF EXPECTED PERIOD OF UNIT-2 MONITOR INOPERABILITYIS LESS THAN TWO WEEKS, EFFLUENT MONITORING REQUIREMENTS WILLBE MET BY SAMPLING.
PHASE 4: UNITS 1 R 2 VICTOREEN PV SYSTEMS BOTH OPERATING (4/93 > )
o THE ACTIONS STATED ABOVE FOR UNIT-I DURING PHASE 2 WILL BE INSTITUTED FOR /NIT-2.
Attachment 1,
Page 4
RM-33 AS INTERIIVIREPLACEMENT FOR RM-14A R B MONITOR CHARACTERISTICS o
RlVl-33: MID-RANGE, BETA SCINTILLATOR.
RM-14A/B: EFFLUENT RANGE, GN1 TUBE.
o XE-133 COMPRISES MORE THAN 99% OF DCPP'S
, PLANT VENT RADIOISOTOPE EMISSIONS.
o FOR XE-133, RM-33 HAS SAME EFFICIENCY AS RM-14 (I.E. NO DEGRADATION IN LLD FOR EXPECTED RELEASES)
o RM-33 HAS MORE RELIABLEMETALBELLOWS PUMP '
RELIABILITYRUN IN-PROGRESS o
EQUIPMENT CONTROL GUIDELINES {EGGS) WILLBE REVISED TO ENSURE SAME OPERABILITY, SURVEILLANCEREQUIREMENTS AS RM-14A &, B.
o JR5%2~HEJOJ3JNE CHANNELASSOCIATED"WITH RIVI-33, CAN PROVIDE CONTINUOUS IODINE SAMPLING AND MONITORING CAPABILITY,AND PARTICULATE SAMPLING.
CONCLUSION o
NO DEGRADATION OF DCPP'S EFFLUENT MONITORING PROGRAM DUE TO INTERIM USE OF RM-33 AS
"SURROGATE" FOR RM-14A &. B.
Attachment 1,
Page5
IMPACT ON THE DCPP EMERGENCY PLAN THREE AREAS AFFECTED'
RADIATIONMONITOR DESIGNATIONS IN THE EMERGENCY PLAN ITSELF o
MANUALDOSE CALCULATION PROCEDURES o
DOSE CALCULATIONSOFTWARE - EARS (EMERGENCY ASSESSMENT AND RESPONSE SYSTEM)
Attachment 1,
Page
IMPACT ON THE DCPP EMERGENCY PLAN PHASE I: UNIT-1 SYSTEIVI INSTALLATION (10/5/92 - 12/16/92)
ACTIONS:
o EMERGENCY PLAN TABLES AND PROCEDURES WILLBE REVISED TO REFLECT USE OF IRIVl-33 iN LIEU OF IRM-I4A& B; o
INANUALDOSE CALCULATIONPROCEDURES: NOT AFFECTED FOR PHASE I; o
EARS NOT AFFECTED FOR PHASE I; SYSTEM STILL OPERABLE USING IRM-33 OR IRM-29.
Attachment 1,
Page 7
IMPACT QN THE DCPP EMERGENCY PLAN PHASE 2: UNIT-1 VICTOREEN SYSTEM OPERATING, UNIT-2 OPERATING WITH EXISTING
. SYSTEM (12/92 - 2/93)
ACTIONS:
o EMERGENCY PLAN TABLES AND PROCEDURES WILLBE REVISED TO REFLECT UNIT DIFFERENCES IN MONITOR
'ESIGNATIONS AND EARS INPUT DATA.
o MANUALDOSE CALCULATIONPROCEDURES WILLBE REVISED TO PROVIDE UNIT SPECIFIC CALCULATION SECTIONS WHICH REFLECT THE NEW MONITOR DESIGNATIONS AND DETECTOR EFFICIENCIES.
o EARS SOFTWARE WILLBE "SPLIT" INTO TWO VERSIONS:
1. UNIT-'t VERSION WITH NEW MONITOR.
DESIGNATIONS AND VICTOREEN DETECTOR ATTRIBUTES; 2. UNIT-2,VERSION UNCHANGED.
o TRAINlNGWILL BE PROVIDED TO EARS. OPERATORS ON USE,OF THE UNIT-SPECIFIC VERSIONS.
Attachm'ent 1, Page
0'
IMPACT ON THE DCPP EMERGENCY PLAN PHASE 3: UNIT-2 VICTOREEN SYSTEM INSTALLATION(2/93 - 3/93)
ACTIONS:
o THE ACTIONS GIVEN ABOVE FOR UNIT-'1 DURING PHASE 1 WILL BE INSTITUTED FOR UNIT-2.
PHASE 4: UNITS 1 5 2 VICTOREEN PV SYSTEMS BOTH OPERATING (4/93 ) I ACTIONS:
o EMERGENCY PLAN TABLES AND PROCEDURE EP G-1 WILLBE REVISED TO REFLECT FINALSYSTEM CONFIGURATION (NO UNIT DIFFERENCES).
o MANUALDOSE CALCULATIONPROCEDURES WILLBE REVISED TO REFLECT FINALSYSTEM CONFIGURATION (NO UNIT DIFFERENCES)
o THE UNIT-1-SPECIFIC EARS SOFTWARE VERSION IMPLEMENTED FOR PHASE 2 WILLBE ADOPTED FOR BOTH UNITS 1 5 2.
o TRAININGWILL BE PROVIDED TO EMERGENCY RESPONSE PERSONNEL Attachment 1,
Page
UNIT-1 PLANT VENT SYSTEM INSTALLATION=
EXISTING, INTERIIVI,AND FINAL CONFIGURATIONS:
1.
PV Noble Gas-1RM-14A & B.
Class-1E, CVI Actuation PV IVlid-Range Gas 1 RM-33 Non Class-1E No CVI Actuation FINAL PV Noble Gas
,, IRM-14 & 14R Non Class-1 E, No CVI 2.
PV Iodine 1 RM-24 PV Mid-Range Iodine PV Iodine 1 RIVI-32 1RM-24 & 24R 3.
PV Particulate 1RM 28A & B 4.
PV IV!id-Range Noble Gas IRM-33 Particulate Fitter from 1RM-32 available for Iab analysis PV Mid-Range Noble Gas 1 RM-33 PV Particulate 1RM-28 & 28R PV Extended Range Gas-1 RIVI-87 6.
PV Gross Gamma 1 RIVI-29 PV Mid-Range Iodine 1RM-32 No Change 1 RM-29 Iodine Cartridge on PV Extended Range Skid No Change 1 RM-29 7.
None.
Containment Purge Exhaust 1RM-44A & B Class-1E, CVI Actuation Containment Purge Exhaust 1RM-44A & B Class-1E, CVI Actuation AttaChment 1,
Appendix
0