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Civil construction and erection of equipment/ Design of GHAVP-1&2 is similar to KAPP-3&4 and
components are under progress in RAPP-7&8. In RAPP-7, RAPP-7&8, except for site specific changes. PSARs of
IC Dome Concreting and Pre-stressing activities have been GHAVP-1&2 as required for FPC, have been reviewed
completed. Erection of feeders, steam generators(SG), with a focus on design/layout differences in GHAVP
PDHRS tanks, and pressuriser has been completed. w.r.t. KAPP-3&4 and site-specific features.
Erection of safety and safety related piping and equipment
is under progress. In RAPP-8 North & South SG vault (iii) KAIGA-5&6
132M EL and IC wall construction including ring beam AERB received an application for Siting Consent
has been completed. for two units of 700MWe PHWRs at Kaiga (Kaiga Units
AERB Site Observer Teams (SOT) were deputed at - 5&6) from NPCIL along with Site Evaluation Report
Kakrapar and Rajasthan Site for physical verification of (SER) and reports on other related topical studies in
compliances and to witness various activities. December 2018. Detailed review of submissions is
being carried out by Site Evaluation Committee (SEC).
Review of reports pertaining to impact of site on plant,
plant on site, and other identified aspects are under
review. Site evaluation committee for KAIGA–5&6
visited Kaiga site to obtain first-hand knowledge of site
characteristics. Subsequently, NPCIL has also submitted
the application for Excavation Consent for KAIGA-5&6
in October 2019. The application and accompanying
reports were reviewed by AERB to ascertain its adequacy,
considering the requirements of AERB/NPP&RR/SG/G-
1 and observations on the same were communicated to
NPCIL.
RAPP-7&8 Main Plant Area
(ii) GHAVP-1&2 Highlights of Safety Review of PHWRs under
Construction
Subsequent to grant of excavation consent by AERB,
NPCIL commenced the excavation activities for main Main aspects of KAPP-3&4 and RAPP-7&8 safety
plant buildings of GHAVP–1&2. Ground improvement review included revised PSARs, Commissioning
by replacing soil by compacted soil-cement has been Procedures, Commissioning Reports, Proposed
undertaken to address the potential liquefaction concerns. Technical Specifications for Operation, KAPP-3 Primary
Excavation and ground improvement works at the site is Containment (PC) Integrated Leak Rate Test (ILRT) and
nearing completion. Structural Integrity Test (SIT) reports, IV&V of Computer
based systems (CBS), Environmental Qualification
NPCIL application for FPC of GHAVP-1&2 is Reports and basis of acceptance of identified equipment
under review at AERB. Preliminary analysis and design etc.
of safety related structures considering the inputs of
geotechnical investigations have been reviewed by (a) KAPP-3 Primary Containment Integrated
AERB. Considering the characteristics of founding strata Leak Rate Test (ILRT)
viz-a-viz configuration and layout of structures, combined
pile-raft type of foundation system is proposed for certain As part of pre-commissioning activities for
safety related structures and raft foundation is proposed KAPP-3, the full pressure structural integrity test
for others. Confirmatory geotechnical investigations and and integrated leak rate test of the containment
initial pile load tests are under progress. These tests were was conducted. AERB officers witnessed the tests
also witnessed by AERB. Finalization of analysis/design as independent observers. Procedures of ILRT and
considering the inputs from confirmatory geotechnical KAPP-3 PC ILRT report were reviewed. The results
investigations and initial pile test results are under progress. of structural integrity tests are under review.

AERB Annual Report 2019 7