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Core Catcher Erection in KKNPP-3 Liner Erection Works in Reactor Building of KKNPP-4

Design Basis Report (DBR) on system for retention received at PFBR and are now stored in FB. This area
and cooling of molten core (core catcher) was also is under access control and area surveillance as well
reviewed along with NPCIL request for erection of core as monitoring of contamination, air activity and stack
catcher of KKNPP-3&4. Based on satisfactory review it activity are being periodically done. Releases reported
was concluded that there is no hold for erection of the are below detection limit (BDL).
core catcher.
Decoupling and recoupling of Large Rotatable Plug
Reports on geological mapping, confirmatory (LRP) bearing is planned for investigation of high torque
geotechnical investigations, analysis and design of observed during trial rotation of LRP. As preparatory
essential loads pump house (UQC) building structure work for the investigation, main vessel preheating
and construction related documents were reviewed system has been shut down for cooling the main vessel
towards compliance to the stipulations and NPCIL was and both the secondary sodium loops are completely
permitted to take up the construction of UQC. drained. AERB Site Observers Team (SOT) deputed
at Kalpakkam Site has been independently observing
AERB carried out review of design adequacy checks ongoing commissioning activities at PFBR with respect
for critical locations in civil engineering structures to regulatory safety aspects.
following AERB safety standards and concrete mix
designs for normal and heavy concrete.

(ii) Kudankulam Nuclear Power Project - 5&6
(KKNPP- 5&6)

NPCIL application for FPC along with relevant
PSAR Chapters are under review with major focus on
design differences w.r.t. KKNPP-3&4.
A.2 Fast Breeder Reactors Based NPPs

(i) Prototype Fast Breeder Reactor (PFBR)

Clearance for receipt, handling and storage of 42
numbers of fresh fuel sub-assemblies (FSA) at Fuel
Building (FB) was issued on June 28, 2019 after
detailed safety review and assessment of the application PFBR BHAVINI Site
along with the supporting documents. FSAs have been

AERB Annual Report 2019 5