Page 170 - Beyond Decommissioning

Experience and lessons learned 151

remarkable landscape design, and certainly one of Seattle’s most loved places. It
encompasses careful consideration of industrial structures and heritage of the site,
while inventing new uses and experiences. This approach could be applicable to NPPs
as well.
A small case is described below (Fig. 6.7). This gasworks was used for supplying
the near Lighthouse (invisible in the photo) and Keepers houses. The Sambro Island
Lighthouse guided Halifax Harbour’s marine traffic for well over 200 years. The Gas
House, which provided refined petroleum to the light, marked a switch from the prac-
tice of using oil for lighthouses. The shingled building of simple design sits on a prom-
inent platform of large granite blocks near the water’s edge. Its simple, rectangular
massing is of interest, with a gable roof and small gable porches. The utilitarian place-
ment of windows and doors is in line with the functional character of the site and
should not be modified in reuse. The wood-shingled roof is aligned with the materials
of the site. The sidewall shingles are much weathered and will require replacement.
Careful attention should be paid to ensuring that the openings are weatherproof and
that roof intersections are properly flashed to keep water out of the structure. The brick
chimney with simple corbelling at the upper courses merits masonry conservation
expertise (Canada’s Historic places, n.d.).

6.2.1.1 BONUS NPP, Puerto Rico
The Boiling Nuclear Superheater (BONUS) reactor was developed as a prototype NPP
to investigate the technical and economic feasibility of the integral boiling-
superheating concept. The reactor first achieved criticality in 1964. It was tested at
various power levels, first as a boiler and later as an integral boiler-superheater.

Fig. 6.7 Gas House detail, Sambro Island, Nova Scotia, Canada.
Credit to Dennis Jarvis.