here - Atomic Energy Regulatory Board

14
thermal hydraulic studies, experimental backup to
confirm the design intent of SGDHR, structural integrity
assessment of Decay Heat Exchanger under Core
Disruptive Accident pressure loading, etc. are under
detailed review.
! Fuel Sub-Assembly design has been modified and
graphite is removed as top axial shield and is replaced
with B 4 C and SS, to avoid possible sodium-graphite
reaction in the presence of oxygen.
! Specialist Group consisting of experts has carried out
in-detail design safety review of Inclined Fuel Transfer
Machine (IFTM) and has made many important
recommendations for safety improvements.
! Aspects related to cable layout within the plant were
reviewed in detail to assess compliance with safety
requirements.
! AERB is currently checking the conformity of PFBR
design with IAEA code NS-R-1, 2000 requirements.
! It was noted that there are a number of safety significant
major equipment, which are required to be installed/
erected in parallel with civil construction. Installation
of first of such equipment, Safety Vessel (SV), is
expected to be started in about 6 months from the start
of construction of reactor vault. Installation of SV would
be considered as the beginning of third sub-stage of
construction authorisation requiring Regulatory Consent.
KAPP-3&4
NPCIL, based on its experience with 540 MWe
PHWR Units built at Tarapur, proposes to build two upgraded
Units of 700 MWe at Kakrapar in Gujarat. AERB has initiated
the review of the Site Evaluation Report submitted by NPCIL
for approval of the site.
DFRP
IGCAR is setting up a Demonstration Fast reactor
fuel Reprocessing Plant (DFRP) at Kalpakkam to process
the carbide fuels from FBTR and fuel assemblies of PFBR
in future. The DFRP would be forerunner of the FBR fuel
reprocessing plant proposed to be set up at Kalpakkam and
would utilise the experience gained from Lead Mini Cell
operation. The DFRP is located adjacent to the Kalpakkam
Reprocessing Plant (KARP), a BARC facility and shares with
it certain safety related systems, facilities and buildings.
A Project Design Safety Committee (PDSC-DFRP)
is currently reviewing aspects such as, plant design safety
criteria, operating experience of Lead Mini Cell and issues
related to sharing of certain facilities with KARP. AERB is
also reviewing an application for construction of the Head
End Facilities of DFRP.
IFSB
IGCAR has proposed to construct an Interim Fuel
Storage Building (IFSB) for PFBR. The facility is being
designed for making fuel assemblies for initial two core
loadings. The IFSB will be constructed within FBTR
complex. A Project Design Safety Committee for IFSB has
been constituted recently and the review process has been
initiated.
Some of the salient observations/ recommendations
during the review process are the following:
! Provision of appropriate shielding to take care of the
gamma radiations from build up of Americium-241.
! Analysis of accidental dropping of fuel Sub-Assembly
as a Design Basis Event.
2.1.2 Authorisations / Permissions Issued for
Nuclear Projects
TAPP-3
! Authorisation for Hot Conditioning and Light Water
Commissioning
! Permission for Draining Light Water from PHT and
Moderator Systems
! Authorisation for Initial Fuel Loading in the Core
TAPP-4
! Authorisation for synchronization of the Unit and
operation upto 50% FP
! Authorisation for operation upto 90% FP
RAPP-6
! Authorisation for Erection of Major Equipment
PFBR
! Authorisation for Re-construction of Nuclear Island
Connected Buildings (NICB) raft.
! Permission for Construction of Perimeter Wall around
NICB and certain Safety Related Buildings/Structures.
! Clearance for Construction of Superstructure for the
eight buildings on common NICB raft (except RV and
SSSB)